Background updates (#4861)

* add background updating

* add RobloxState

* fix potential race condition with RobloxState

* update ForceRobloxReinstallation in menu

* disable AssertReadOnlyDirectory

* add storage space check

* add logging to IsEligibleForBackgroundUpdate

* add a setting to toggle background updates

* fix mutex names being mixed up

* update string

* update strings

* update strings

Bloxstrap/App.xaml.cs

@@ -42,7 +42,7 @@ namespace Bloxstrap
 
         public static bool IsProductionBuild => IsActionBuild && BuildMetadata.CommitRef.StartsWith("tag", StringComparison.Ordinal);
 
-        public static bool IsStudioVisible => !String.IsNullOrEmpty(App.State.Prop.Studio.VersionGuid);
+        public static bool IsStudioVisible => !String.IsNullOrEmpty(App.RobloxState.Prop.Studio.VersionGuid);
 
         public static readonly MD5 MD5Provider = MD5.Create();
 
@@ -54,6 +54,8 @@ namespace Bloxstrap
 
         public static readonly JsonManager<State> State = new();
 
+        public static readonly JsonManager<RobloxState> RobloxState = new();
+
         public static readonly FastFlagManager FastFlags = new();
 
         public static readonly HttpClient HttpClient = new(
@@ -336,6 +338,7 @@ namespace Bloxstrap
 
                 Settings.Load();
                 State.Load();
+                RobloxState.Load();
                 FastFlags.Load();
 
                 if (!Locale.SupportedLocales.ContainsKey(Settings.Prop.Locale))

Bloxstrap/AppData/RobloxPlayerData.cs

@@ -16,7 +16,7 @@ namespace Bloxstrap.AppData
 
         public override string ExecutableName => "RobloxPlayerBeta.exe";
 
-        public override AppState State => App.State.Prop.Player;
+        public override AppState State => App.RobloxState.Prop.Player;
 
         public override IReadOnlyDictionary<string, string> PackageDirectoryMap { get; set; } = new Dictionary<string, string>()
         {

Bloxstrap/AppData/RobloxStudioData.cs

@@ -10,7 +10,7 @@
 
         public override string ExecutableName => "RobloxStudioBeta.exe";
 
-        public override AppState State => App.State.Prop.Studio;
+        public override AppState State => App.RobloxState.Prop.Studio;
 
         public override IReadOnlyDictionary<string, string> PackageDirectoryMap { get; set; } = new Dictionary<string, string>()
         {

Bloxstrap/Bootstrapper.cs

@@ -49,6 +49,7 @@ namespace Bloxstrap
         private LaunchMode _launchMode;
 
         private string _launchCommandLine = App.LaunchSettings.RobloxLaunchArgs;
+        private Version? _latestVersion = null;
         private string _latestVersionGuid = null!;
         private string _latestVersionDirectory = null!;
         private PackageManifest _versionPackageManifest = null!;
@@ -60,7 +61,7 @@ namespace Bloxstrap
         private long _totalDownloadedBytes = 0;
         private bool _packageExtractionSuccess = true;
 
-        private bool _mustUpgrade => App.LaunchSettings.ForceFlag.Active || String.IsNullOrEmpty(AppData.State.VersionGuid) || !File.Exists(AppData.ExecutablePath);
+        private bool _mustUpgrade => App.LaunchSettings.ForceFlag.Active || App.State.Prop.ForceReinstall || String.IsNullOrEmpty(AppData.State.VersionGuid) || !File.Exists(AppData.ExecutablePath);
         private bool _noConnection = false;
 
         private AsyncMutex? _mutex;
@@ -70,6 +71,9 @@ namespace Bloxstrap
         public IBootstrapperDialog? Dialog = null;
 
         public bool IsStudioLaunch => _launchMode != LaunchMode.Player;
+
+        public string MutexName { get; set; } = "Bloxstrap-Bootstrapper";
+        public bool QuitIfMutexExists { get; set; } = false;
         #endregion
 
         #region Core
@@ -198,22 +202,24 @@ namespace Bloxstrap
             // ensure only one instance of the bootstrapper is running at the time
             // so that we don't have stuff like two updates happening simultaneously
 
-            bool mutexExists = false;
+            bool mutexExists = Utilities.DoesMutexExist(MutexName);
 
-            try
+            if (mutexExists)
             {
-                Mutex.OpenExisting("Bloxstrap-Bootstrapper").Close();
-                App.Logger.WriteLine(LOG_IDENT, "Bloxstrap-Bootstrapper mutex exists, waiting...");
-                SetStatus(Strings.Bootstrapper_Status_WaitingOtherInstances);
-                mutexExists = true;
-            }
-            catch (Exception)
-            {
-                // no mutex exists
+                if (!QuitIfMutexExists)
+                {
+                    App.Logger.WriteLine(LOG_IDENT, $"{MutexName} mutex exists, waiting...");
+                    SetStatus(Strings.Bootstrapper_Status_WaitingOtherInstances);
+                }
+                else
+                {
+                    App.Logger.WriteLine(LOG_IDENT, $"{MutexName} mutex exists, exiting!");
+                    return;
+                }
             }
 
             // wait for mutex to be released if it's not yet
-            await using var mutex = new AsyncMutex(false, "Bloxstrap-Bootstrapper");
+            await using var mutex = new AsyncMutex(false, MutexName);
             await mutex.AcquireAsync(_cancelTokenSource.Token);
 
             _mutex = mutex;
@@ -223,6 +229,7 @@ namespace Bloxstrap
             {
                 App.Settings.Load();
                 App.State.Load();
+                App.RobloxState.Load();
             }
 
             if (!_noConnection)
@@ -237,12 +244,35 @@ namespace Bloxstrap
                 }
             }
 
+            CleanupVersionsFolder(); // cleanup after background updater
+
             bool allModificationsApplied = true;
 
             if (!_noConnection)
             {
                 if (AppData.State.VersionGuid != _latestVersionGuid || _mustUpgrade)
-                    await UpgradeRoblox();
+                {
+                    bool backgroundUpdaterMutexOpen = Utilities.DoesMutexExist("Bloxstrap-BackgroundUpdater");
+                    if (App.LaunchSettings.BackgroundUpdaterFlag.Active)
+                        backgroundUpdaterMutexOpen = false; // we want to actually update lol
+
+                    App.Logger.WriteLine(LOG_IDENT, $"Background updater running: {backgroundUpdaterMutexOpen}");
+
+                    if (backgroundUpdaterMutexOpen && _mustUpgrade)
+                    {
+                        // I am Forced Upgrade, killer of Background Updates
+                        Utilities.KillBackgroundUpdater();
+                        backgroundUpdaterMutexOpen = false;
+                    }
+                   
+                    if (!backgroundUpdaterMutexOpen)
+                    {
+                        if (IsEligibleForBackgroundUpdate())
+                            StartBackgroundUpdater();
+                        else
+                            await UpgradeRoblox();
+                    }
+                }
 
                 if (_cancelTokenSource.IsCancellationRequested)
                     return;
@@ -339,11 +369,13 @@ namespace Bloxstrap
                 key.SetValueSafe("www.roblox.com", Deployment.IsDefaultChannel ? "" : Deployment.Channel);
 
                 _latestVersionGuid = clientVersion.VersionGuid;
+                _latestVersion = Utilities.ParseVersionSafe(clientVersion.Version);
             }
             else
             {
                 App.Logger.WriteLine(LOG_IDENT, $"Version set to {App.LaunchSettings.VersionFlag.Data} from arguments");
                 _latestVersionGuid = App.LaunchSettings.VersionFlag.Data;
+                // we can't determine the version
             }
 
             _latestVersionDirectory = Path.Combine(Paths.Versions, _latestVersionGuid);
@@ -366,6 +398,79 @@ namespace Bloxstrap
             }
         }
 
+        private bool IsEligibleForBackgroundUpdate()
+        {
+            const string LOG_IDENT = "Bootstrapper::IsEligibleForBackgroundUpdate";
+
+            if (App.LaunchSettings.BackgroundUpdaterFlag.Active)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Is the background updater process");
+                return false;
+            }
+
+            if (!App.Settings.Prop.BackgroundUpdatesEnabled)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Background updates disabled");
+                return false;
+            }
+
+            if (IsStudioLaunch)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Studio launch");
+                return false;
+            }
+
+            if (_mustUpgrade)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Must upgrade is true");
+                return false;
+            }
+
+            // at least 3GB of free space
+            const long minimumFreeSpace = 3_000_000_000;
+            long space = Filesystem.GetFreeDiskSpace(Paths.Base);
+            if (space < minimumFreeSpace)
+            {
+                App.Logger.WriteLine(LOG_IDENT, $"Not eligible: User has {space} free space, at least {minimumFreeSpace} is required");
+                return false;
+            }
+
+            if (_latestVersion == default)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Latest version is undefined");
+                return false;
+            }
+
+            Version? currentVersion = Utilities.GetRobloxVersion(AppData);
+            if (currentVersion == default)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Current version is undefined");
+                return false;
+            }
+
+            // always normally upgrade for downgrades
+            if (currentVersion.Minor > _latestVersion.Minor)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Not eligible: Downgrade");
+                return false;
+            }
+
+            // only background update if we're:
+            // - one major update behind
+            // - the same major update
+            int diff = _latestVersion.Minor - currentVersion.Minor;
+            if (diff == 0 || diff == 1)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Eligible");
+                return true;
+            }
+            else
+            {
+                App.Logger.WriteLine(LOG_IDENT, $"Not eligible: Major version diff is {diff}");
+                return false;
+            }
+        }
+
         private void StartRoblox()
         {
             const string LOG_IDENT = "Bootstrapper::StartRoblox";
@@ -718,13 +823,20 @@ namespace Bloxstrap
         {
             const string LOG_IDENT = "Bootstrapper::CleanupVersionsFolder";
 
+            if (App.LaunchSettings.BackgroundUpdaterFlag.Active)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Background updater tried to cleanup, stopping!");
+                return;
+            }
+
             foreach (string dir in Directory.GetDirectories(Paths.Versions))
             {
                 string dirName = Path.GetFileName(dir);
 
-                if (dirName != App.State.Prop.Player.VersionGuid && dirName != App.State.Prop.Studio.VersionGuid)
+                if (dirName != App.RobloxState.Prop.Player.VersionGuid && dirName != App.RobloxState.Prop.Studio.VersionGuid)
                 {
-                    Filesystem.AssertReadOnlyDirectory(dir);
+                    // TODO: this is too expensive
+                    //Filesystem.AssertReadOnlyDirectory(dir);
 
                     // check if it's still being used first
                     // we dont want to accidentally delete the files of a running roblox instance
@@ -801,11 +913,11 @@ namespace Bloxstrap
             _isInstalling = true;
 
             // make sure nothing is running before continuing upgrade
-            if (!IsStudioLaunch) // TODO: wait for studio processes to close before updating to prevent data loss
+            if (!App.LaunchSettings.BackgroundUpdaterFlag.Active && !IsStudioLaunch) // TODO: wait for studio processes to close before updating to prevent data loss
                 KillRobloxPlayers();
 
             // get a fully clean install
-            if (Directory.Exists(_latestVersionDirectory))
+            if (!App.LaunchSettings.BackgroundUpdaterFlag.Active && Directory.Exists(_latestVersionDirectory))
             {
                 try
                 {
@@ -958,8 +1070,8 @@ namespace Bloxstrap
 
             var allPackageHashes = new List<string>();
 
-            allPackageHashes.AddRange(App.State.Prop.Player.PackageHashes.Values);
-            allPackageHashes.AddRange(App.State.Prop.Studio.PackageHashes.Values);
+            allPackageHashes.AddRange(App.RobloxState.Prop.Player.PackageHashes.Values);
+            allPackageHashes.AddRange(App.RobloxState.Prop.Studio.PackageHashes.Values);
 
             if (!App.Settings.Prop.DebugDisableVersionPackageCleanup)
             {
@@ -988,7 +1100,7 @@ namespace Bloxstrap
 
             AppData.State.Size = distributionSize;
 
-            int totalSize = App.State.Prop.Player.Size + App.State.Prop.Studio.Size;
+            int totalSize = App.RobloxState.Prop.Player.Size + App.RobloxState.Prop.Studio.Size;
 
             using (var uninstallKey = Registry.CurrentUser.CreateSubKey(App.UninstallKey))
             {
@@ -998,10 +1110,26 @@ namespace Bloxstrap
             App.Logger.WriteLine(LOG_IDENT, $"Registered as {totalSize} KB");
 
             App.State.Save();
+            App.RobloxState.Save();
 
             _isInstalling = false;
         }
 
+        private static void StartBackgroundUpdater()
+        {
+            const string LOG_IDENT = "Bootstrapper::StartBackgroundUpdater";
+
+            if (Utilities.DoesMutexExist("Bloxstrap-BackgroundUpdater"))
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Background updater already running");
+                return;
+            }
+
+            App.Logger.WriteLine(LOG_IDENT, "Starting background updater");
+
+            Process.Start(Paths.Process, "-backgroundupdater");
+        }
+
         private async Task<bool> ApplyModifications()
         {
             const string LOG_IDENT = "Bootstrapper::ApplyModifications";
@@ -1135,7 +1263,7 @@ namespace Bloxstrap
 
             var fileRestoreMap = new Dictionary<string, List<string>>();
 
-            foreach (string fileLocation in App.State.Prop.ModManifest)
+            foreach (string fileLocation in App.RobloxState.Prop.ModManifest)
             {
                 if (modFolderFiles.Contains(fileLocation))
                     continue;
@@ -1180,8 +1308,17 @@ namespace Bloxstrap
                 }
             }
 
-            App.State.Prop.ModManifest = modFolderFiles;
-            App.State.Save();
+            // make sure we're not overwriting a new update
+            // if we're the background update process, always overwrite
+            if (App.LaunchSettings.BackgroundUpdaterFlag.Active || !App.RobloxState.HasFileOnDiskChanged())
+            {
+                App.RobloxState.Prop.ModManifest = modFolderFiles;
+                App.RobloxState.Save();
+            }
+            else
+            {
+                App.Logger.WriteLine(LOG_IDENT, "RobloxState disk mismatch, not saving ModManifest");
+            }
 
             App.Logger.WriteLine(LOG_IDENT, $"Finished checking file mods");
 

Bloxstrap/Installer.cs

@@ -197,7 +197,7 @@ namespace Bloxstrap
 
             var processes = new List<Process>();
             
-            if (!String.IsNullOrEmpty(App.State.Prop.Player.VersionGuid))
+            if (!String.IsNullOrEmpty(App.RobloxState.Prop.Player.VersionGuid))
                 processes.AddRange(Process.GetProcessesByName(App.RobloxPlayerAppName));
 
             if (App.IsStudioVisible)
@@ -587,16 +587,23 @@ namespace Bloxstrap
                     }
                 }
 
-                if (Utilities.CompareVersions(existingVer, "2.8.3") == VersionComparison.LessThan)
+                if (Utilities.CompareVersions(existingVer, "2.9.0") == VersionComparison.LessThan)
                 {
-                    // force reinstallation
-                    App.State.Prop.Player.VersionGuid = "";
-                    App.State.Prop.Studio.VersionGuid = "";
+                    // move from App.State to App.RobloxState
+                    if (App.State.Prop.GetDeprecatedPlayer() != null)
+                        App.RobloxState.Prop.Player = App.State.Prop.GetDeprecatedPlayer()!;
+
+                    if (App.State.Prop.GetDeprecatedStudio() != null)
+                        App.RobloxState.Prop.Studio = App.State.Prop.GetDeprecatedStudio()!;
+
+                    if (App.State.Prop.GetDeprecatedModManifest() != null)
+                        App.RobloxState.Prop.ModManifest = App.State.Prop.GetDeprecatedModManifest()!;
                 }
 
                 App.Settings.Save();
                 App.FastFlags.Save();
                 App.State.Save();
+                App.RobloxState.Save();
             }
 
             if (currentVer is null)

Bloxstrap/JsonManager.cs

@@ -8,6 +8,11 @@ namespace Bloxstrap
         
         public T Prop { get; set; } = new();
 
+        /// <summary>
+        /// The file hash when last retrieved from disk
+        /// </summary>
+        public string? LastFileHash { get; private set; }
+
         public virtual string ClassName => typeof(T).Name;
 
         public virtual string FileLocation => Path.Combine(Paths.Base, $"{ClassName}.json");
@@ -22,12 +27,15 @@ namespace Bloxstrap
 
             try
             {
-                T? settings = JsonSerializer.Deserialize<T>(File.ReadAllText(FileLocation));
+                string contents = File.ReadAllText(FileLocation);
+
+                T? settings = JsonSerializer.Deserialize<T>(contents);
 
                 if (settings is null)
                     throw new ArgumentNullException("Deserialization returned null");
 
                 Prop = settings;
+                LastFileHash = MD5Hash.FromString(contents);
 
                 App.Logger.WriteLine(LOG_IDENT, "Loaded successfully!");
             }
@@ -74,7 +82,11 @@ namespace Bloxstrap
 
             try
             {
-                File.WriteAllText(FileLocation, JsonSerializer.Serialize(Prop, new JsonSerializerOptions { WriteIndented = true }));
+                string contents = JsonSerializer.Serialize(Prop, new JsonSerializerOptions { WriteIndented = true });
+
+                File.WriteAllText(FileLocation, contents);
+
+                LastFileHash = MD5Hash.FromString(contents);
             }
             catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
             {
@@ -89,5 +101,13 @@ namespace Bloxstrap
 
             App.Logger.WriteLine(LOG_IDENT, "Save complete!");
         }
+
+        /// <summary>
+        /// Is the file on disk different to the one deserialised during this session?
+        /// </summary>
+        public bool HasFileOnDiskChanged()
+        {
+            return LastFileHash != MD5Hash.FromFile(FileLocation);
+        }
     }
 }

Bloxstrap/LaunchHandler.cs

@@ -4,6 +4,7 @@ using Windows.Win32;
 using Windows.Win32.Foundation;
 
 using Bloxstrap.UI.Elements.Dialogs;
+using Bloxstrap.Enums;
 
 namespace Bloxstrap
 {
@@ -58,6 +59,11 @@ namespace Bloxstrap
                 App.Logger.WriteLine(LOG_IDENT, "Opening watcher");
                 LaunchWatcher();
             }
+            else if (App.LaunchSettings.BackgroundUpdaterFlag.Active)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Opening background updater");
+                LaunchBackgroundUpdater();
+            }
             else if (App.LaunchSettings.RobloxLaunchMode != LaunchMode.None)
             {
                 App.Logger.WriteLine(LOG_IDENT, $"Opening bootstrapper ({App.LaunchSettings.RobloxLaunchMode})");
@@ -295,5 +301,51 @@ namespace Bloxstrap
                 App.Terminate();
             });
         }
+
+        public static void LaunchBackgroundUpdater()
+        {
+            const string LOG_IDENT = "LaunchHandler::LaunchBackgroundUpdater";
+
+            // Activate some LaunchFlags we need
+            App.LaunchSettings.QuietFlag.Active = true;
+            App.LaunchSettings.NoLaunchFlag.Active = true;
+
+            App.Logger.WriteLine(LOG_IDENT, "Initializing bootstrapper");
+            App.Bootstrapper = new Bootstrapper(LaunchMode.Player)
+            {
+                MutexName = "Bloxstrap-BackgroundUpdater",
+                QuitIfMutexExists = true
+            };
+
+            CancellationTokenSource cts = new CancellationTokenSource();
+
+            Task.Run(() =>
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Started event waiter");
+                using (EventWaitHandle handle = new EventWaitHandle(false, EventResetMode.AutoReset, "Bloxstrap-BackgroundUpdaterKillEvent"))
+                    handle.WaitOne();
+
+                App.Logger.WriteLine(LOG_IDENT, "Received close event, killing it all!");
+                App.Bootstrapper.Cancel();
+            }, cts.Token);
+
+            Task.Run(App.Bootstrapper.Run).ContinueWith(t =>
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Bootstrapper task has finished");
+                cts.Cancel(); // stop event waiter
+
+                if (t.IsFaulted)
+                {
+                    App.Logger.WriteLine(LOG_IDENT, "An exception occurred when running the bootstrapper");
+
+                    if (t.Exception is not null)
+                        App.FinalizeExceptionHandling(t.Exception);
+                }
+
+                App.Terminate();
+            });
+
+            App.Logger.WriteLine(LOG_IDENT, "Exiting");
+        }
     }
 }

Bloxstrap/LaunchSettings.cs

@@ -12,31 +12,33 @@ namespace Bloxstrap
 {
     public class LaunchSettings
     {
-        public LaunchFlag MenuFlag      { get; } = new("preferences,menu,settings");
+        public LaunchFlag MenuFlag              { get; } = new("preferences,menu,settings");
 
-        public LaunchFlag WatcherFlag   { get; } = new("watcher");
+        public LaunchFlag WatcherFlag           { get; } = new("watcher");
 
-        public LaunchFlag QuietFlag     { get; } = new("quiet");
+        public LaunchFlag BackgroundUpdaterFlag { get; } = new("backgroundupdater");
 
-        public LaunchFlag UninstallFlag { get; } = new("uninstall");
+        public LaunchFlag QuietFlag             { get; } = new("quiet");
 
-        public LaunchFlag NoLaunchFlag  { get; } = new("nolaunch");
+        public LaunchFlag UninstallFlag         { get; } = new("uninstall");
+
+        public LaunchFlag NoLaunchFlag          { get; } = new("nolaunch");
         
-        public LaunchFlag TestModeFlag  { get; } = new("testmode");
+        public LaunchFlag TestModeFlag          { get; } = new("testmode");
 
-        public LaunchFlag NoGPUFlag     { get; } = new("nogpu");
+        public LaunchFlag NoGPUFlag             { get; } = new("nogpu");
 
-        public LaunchFlag UpgradeFlag   { get; } = new("upgrade");
+        public LaunchFlag UpgradeFlag           { get; } = new("upgrade");
         
-        public LaunchFlag PlayerFlag    { get; } = new("player");
+        public LaunchFlag PlayerFlag            { get; } = new("player");
         
-        public LaunchFlag StudioFlag    { get; } = new("studio");
+        public LaunchFlag StudioFlag            { get; } = new("studio");
 
-        public LaunchFlag VersionFlag   { get; } = new("version");
+        public LaunchFlag VersionFlag           { get; } = new("version");
 
-        public LaunchFlag ChannelFlag   { get; } = new("channel");
+        public LaunchFlag ChannelFlag           { get; } = new("channel");
 
-        public LaunchFlag ForceFlag     { get; } = new("force");
+        public LaunchFlag ForceFlag             { get; } = new("force");
 
 #if DEBUG
         public bool BypassUpdateCheck => true;

Bloxstrap/Models/Persistable/RobloxState.cs

@@ -0,0 +1,11 @@
+namespace Bloxstrap.Models.Persistable
+{
+    public class RobloxState
+    {
+        public AppState Player { get; set; } = new();
+
+        public AppState Studio { get; set; } = new();
+
+        public List<string> ModManifest { get; set; } = new();
+    }
+}

Bloxstrap/Models/Persistable/Settings.cs

@@ -17,6 +17,7 @@ namespace Bloxstrap.Models.Persistable
         public bool UseFastFlagManager { get; set; } = true;
         public bool WPFSoftwareRender { get; set; } = false;
         public bool EnableAnalytics { get; set; } = true;
+        public bool BackgroundUpdatesEnabled { get; set; } = true;
         public bool DebugDisableVersionPackageCleanup { get; set; } = false;
         public string? SelectedCustomTheme { get; set; } = null;
 

Bloxstrap/Models/Persistable/State.cs

@@ -6,12 +6,28 @@
 
         public bool PromptWebView2Install { get; set; } = true;
 
-        public AppState Player { get; set; } = new();
-
-        public AppState Studio { get; set; } = new();
+        public bool ForceReinstall { get; set; } = false;
 
         public WindowState SettingsWindow { get; set; } = new();
 
-        public List<string> ModManifest { get; set; } = new();
+        #region Deprecated properties
+        /// <summary>
+        /// Deprecated, use App.RobloxState.Player
+        /// </summary>
+        public AppState? Player { private get; set; }
+        public AppState? GetDeprecatedPlayer() => Player;
+
+        /// <summary>
+        /// Deprecated, use App.RobloxState.Studio
+        /// </summary>
+        public AppState? Studio { private get; set; }
+        public AppState? GetDeprecatedStudio() => Studio;
+
+        /// <summary>
+        /// Deprecated, use App.RobloxState.ModManifest
+        /// </summary>
+        public List<string>? ModManifest { private get; set; }
+        public List<string>? GetDeprecatedModManifest() => ModManifest;
+        #endregion
     }
 }

Bloxstrap/Resources/Strings.Designer.cs

@@ -2545,6 +2545,24 @@ namespace Bloxstrap.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Update Roblox in the background instead of waiting. Not recommended for slow networks. At least 3GB of free storage space is required for this feature to work..
+        /// </summary>
+        public static string Menu_Behaviour_BackgroundUpdates_Description {
+            get {
+                return ResourceManager.GetString("Menu.Behaviour.BackgroundUpdates.Description", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Background updates.
+        /// </summary>
+        public static string Menu_Behaviour_BackgroundUpdates_Title {
+            get {
+                return ResourceManager.GetString("Menu.Behaviour.BackgroundUpdates.Title", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Prevent against closures of your existing game from accidentally launching another one..
         /// </summary>

Bloxstrap/Resources/Strings.resx

@@ -1445,4 +1445,10 @@ Defaulting to Fluent.</value>
   <data name="Menu.Appearance.CustomThemes.RenameFailed" xml:space="preserve">
     <value>Failed to rename custom theme {0}: {1}</value>
   </data>
+  <data name="Menu.Behaviour.BackgroundUpdates.Title" xml:space="preserve">
+    <value>Background updates</value>
+  </data>
+  <data name="Menu.Behaviour.BackgroundUpdates.Description" xml:space="preserve">
+    <value>Update Roblox in the background instead of waiting. Not recommended for slow networks. At least 3GB of free storage space is required for this feature to work.</value>
+  </data>
 </root>

Bloxstrap/UI/Elements/Bootstrapper/ByfronDialog.xaml.cs

@@ -104,7 +104,7 @@ namespace Bloxstrap.UI.Elements.Bootstrapper
 
         public ByfronDialog()
         {
-            string version = Utilities.GetRobloxVersion(Bootstrapper?.IsStudioLaunch ?? false);
+            string version = Utilities.GetRobloxVersionStr(Bootstrapper?.IsStudioLaunch ?? false);
             _viewModel = new ByfronDialogViewModel(this, version);
             DataContext = _viewModel;
             Title = App.Settings.Prop.BootstrapperTitle;

Bloxstrap/UI/Elements/Settings/Pages/BootstrapperPage.xaml

@@ -30,13 +30,19 @@
             <ui:ToggleSwitch IsChecked="{Binding ForceRobloxLanguage, Mode=TwoWay}" />
         </controls:OptionControl>
 
+        <controls:OptionControl 
+            Header="{x:Static resources:Strings.Menu_Behaviour_BackgroundUpdates_Title}"
+            Description="{x:Static resources:Strings.Menu_Behaviour_BackgroundUpdates_Description}">
+            <ui:ToggleSwitch IsChecked="{Binding BackgroundUpdates, Mode=TwoWay}" />
+        </controls:OptionControl>
+
         <controls:OptionControl 
             Header="{x:Static resources:Strings.Menu_Behaviour_ForceRobloxReinstall_Title}"
             Description="{x:Static resources:Strings.Menu_Behaviour_ForceRobloxReinstall_Description}">
             <controls:OptionControl.Style>
                 <Style TargetType="controls:OptionControl">
                     <Style.Triggers>
-                        <DataTrigger Binding="{Binding ForceRobloxReinstallation, Mode=OneTime}" Value="True">
+                        <DataTrigger Binding="{Binding IsRobloxInstallationMissing, Mode=OneTime}" Value="True">
                             <Setter Property="IsEnabled" Value="False" />
                         </DataTrigger>
                     </Style.Triggers>

Bloxstrap/UI/ViewModels/Settings/BehaviourViewModel.cs

@@ -2,9 +2,6 @@
 {
     public class BehaviourViewModel : NotifyPropertyChangedViewModel
     {
-        private string _oldPlayerVersionGuid = "";
-        private string _oldStudioVersionGuid = "";
-
         public bool ConfirmLaunches
         {
             get => App.Settings.Prop.ConfirmLaunches;
@@ -17,26 +14,18 @@
             set => App.Settings.Prop.ForceRobloxLanguage = value;
         }
 
+        public bool BackgroundUpdates
+        {
+            get => App.Settings.Prop.BackgroundUpdatesEnabled;
+            set => App.Settings.Prop.BackgroundUpdatesEnabled = value;
+        }
+
+        public bool IsRobloxInstallationMissing => String.IsNullOrEmpty(App.RobloxState.Prop.Player.VersionGuid) && String.IsNullOrEmpty(App.RobloxState.Prop.Studio.VersionGuid);
+
         public bool ForceRobloxReinstallation
         {
-            // wouldnt it be better to check old version guids?
-            // what about fresh installs?
-            get => String.IsNullOrEmpty(App.State.Prop.Player.VersionGuid) && String.IsNullOrEmpty(App.State.Prop.Studio.VersionGuid);
-            set
-            {
-                if (value)
-                {
-                    _oldPlayerVersionGuid = App.State.Prop.Player.VersionGuid;
-                    _oldStudioVersionGuid = App.State.Prop.Studio.VersionGuid;
-                    App.State.Prop.Player.VersionGuid = "";
-                    App.State.Prop.Studio.VersionGuid = "";
-                }
-                else
-                {
-                    App.State.Prop.Player.VersionGuid = _oldPlayerVersionGuid;
-                    App.State.Prop.Studio.VersionGuid = _oldStudioVersionGuid;
-                }
-            }
+            get => App.State.Prop.ForceReinstall || IsRobloxInstallationMissing;
+            set => App.State.Prop.ForceReinstall = value;
         }
     }
 }

Bloxstrap/Utilities.cs

@@ -75,10 +75,24 @@ namespace Bloxstrap
             }
         }
 
-        public static string GetRobloxVersion(bool studio)
+        /// <summary>
+        /// Parses the input version string and prints if fails
+        /// </summary>
+        public static Version? ParseVersionSafe(string versionStr)
         {
-            IAppData data = studio ? new RobloxStudioData() : new RobloxPlayerData();
+            const string LOG_IDENT = "Utilities::ParseVersionSafe";
 
+            if (!Version.TryParse(versionStr, out Version? version))
+            {
+                App.Logger.WriteLine(LOG_IDENT, $"Failed to convert {versionStr} to a valid Version type.");
+                return version;
+            }
+
+            return version;
+        }
+
+        public static string GetRobloxVersionStr(IAppData data)
+        {
             string playerLocation = data.ExecutablePath;
 
             if (!File.Exists(playerLocation))
@@ -92,6 +106,19 @@ namespace Bloxstrap
             return versionInfo.ProductVersion.Replace(", ", ".");
         }
 
+        public static string GetRobloxVersionStr(bool studio)
+        {
+            IAppData data = studio ? new RobloxStudioData() : new RobloxPlayerData();
+
+            return GetRobloxVersionStr(data);
+        }
+
+        public static Version? GetRobloxVersion(IAppData data)
+        {
+            string str = GetRobloxVersionStr(data);
+            return ParseVersionSafe(str);
+        }
+
         public static Process[] GetProcessesSafe()
         {
             const string LOG_IDENT = "Utilities::GetProcessesSafe";
@@ -107,5 +134,24 @@ namespace Bloxstrap
                 return Array.Empty<Process>(); // can we retry?
             }
         }
+
+        public static bool DoesMutexExist(string name)
+        {
+            try
+            {
+                Mutex.OpenExisting(name).Close();
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public static void KillBackgroundUpdater()
+        {
+            using EventWaitHandle handle = new EventWaitHandle(false, EventResetMode.AutoReset, "Bloxstrap-BackgroundUpdaterKillEvent");
+            handle.Set();
+        }
     }
 }

Bloxstrap/Utility/MD5Hash.cs

@@ -25,6 +25,11 @@ namespace Bloxstrap.Utility
             return FromStream(stream);
         }
 
+        public static string FromString(string str)
+        {
+            return FromBytes(Encoding.UTF8.GetBytes(str));
+        }
+
         public static string Stringify(byte[] hash)
         {
             return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();