remove Async suffixes; they're factory methods not actual async methods.

src/Ryujinx/Common/ThemeManager.cs

@@ -4,11 +4,11 @@ namespace Ryujinx.Ava.Common
 {
     public static class ThemeManager
     {
-        public static event EventHandler ThemeChanged;
+        public static event Action ThemeChanged;
 
         public static void OnThemeChanged()
         {
-            ThemeChanged?.Invoke(null, EventArgs.Empty);
+            ThemeChanged?.Invoke();
         }
     }
 }

src/Ryujinx/UI/Helpers/Commands.cs

@@ -0,0 +1,48 @@
+using CommunityToolkit.Mvvm.Input;
+using System;
+using System.Threading.Tasks;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+#nullable enable
+    public static class Commands
+    {
+        public static RelayCommand Create(Action action)
+            => new(action);
+        public static RelayCommand CreateConditional(Action action, Func<bool> canExecute)
+            => new(action, canExecute);
+        
+        public static RelayCommand<T> CreateWithArg<T>(Action<T?> action)
+            => new(action);
+        public static RelayCommand<T> CreateConditionalWithArg<T>(Action<T?> action, Predicate<T?> canExecute)
+            => new(action, canExecute);
+
+        public static AsyncRelayCommand Create(Func<Task> action)
+            => new(action, AsyncRelayCommandOptions.None);
+        public static AsyncRelayCommand CreateConcurrent(Func<Task> action)
+            => new(action, AsyncRelayCommandOptions.AllowConcurrentExecutions);
+        public static AsyncRelayCommand CreateSilentFail(Func<Task> action)
+            => new(action, AsyncRelayCommandOptions.FlowExceptionsToTaskScheduler);
+        
+        public static AsyncRelayCommand<T> CreateWithArg<T>(Func<T?, Task> action)
+            => new(action, AsyncRelayCommandOptions.None);
+        public static AsyncRelayCommand<T> CreateConcurrentWithArg<T>(Func<T?, Task> action)
+            => new(action, AsyncRelayCommandOptions.AllowConcurrentExecutions);
+        public static AsyncRelayCommand<T> CreateSilentFailWithArg<T>(Func<T?, Task> action)
+            => new(action, AsyncRelayCommandOptions.FlowExceptionsToTaskScheduler);
+
+        public static AsyncRelayCommand CreateConditional(Func<Task> action, Func<bool> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.None);
+        public static AsyncRelayCommand CreateConcurrentConditional(Func<Task> action, Func<bool> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.AllowConcurrentExecutions);
+        public static AsyncRelayCommand CreateSilentFailConditional(Func<Task> action, Func<bool> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.FlowExceptionsToTaskScheduler);
+        
+        public static AsyncRelayCommand<T> CreateConditionalWithArg<T>(Func<T?, Task> action, Predicate<T?> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.None);
+        public static AsyncRelayCommand<T> CreateConcurrentConditionalWithArg<T>(Func<T?, Task> action, Predicate<T?> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.AllowConcurrentExecutions);
+        public static AsyncRelayCommand<T> CreateSilentFailConditionalWithArg<T>(Func<T?, Task> action, Predicate<T?> canExecute)
+            => new(action, canExecute, AsyncRelayCommandOptions.FlowExceptionsToTaskScheduler);
+    }
+}

src/Ryujinx/UI/ViewModels/AboutWindowViewModel.cs

@@ -27,7 +27,7 @@ namespace Ryujinx.Ava.UI.ViewModels
             ThemeManager.ThemeChanged += ThemeManager_ThemeChanged;
         }
 
-        private void ThemeManager_ThemeChanged(object sender, EventArgs e)
+        private void ThemeManager_ThemeChanged()
         {
             Dispatcher.UIThread.Post(() => UpdateLogoTheme(ConfigurationState.Instance.UI.BaseStyle.Value));
         }

src/Ryujinx/UI/Views/Main/MainMenuBarView.axaml.cs

@@ -43,7 +43,13 @@ namespace Ryujinx.Ava.UI.Views.Main
             PauseEmulationMenuItem.Command = new RelayCommand(() => ViewModel.AppHost?.Pause());
             ResumeEmulationMenuItem.Command = new RelayCommand(() => ViewModel.AppHost?.Resume());
             StopEmulationMenuItem.Command = new AsyncRelayCommand(() => ViewModel.AppHost?.ShowExitPrompt().OrCompleted());
-            CheatManagerMenuItem.Command = new AsyncRelayCommand(OpenCheatManagerForCurrentApp);
+            CheatManagerMenuItem.Command = new AsyncRelayCommand(async () =>
+            {
+                try
+                {
+                    await OpenCheatManagerForCurrentApp();
+                } catch {}
+            });
             InstallFileTypesMenuItem.Command = new AsyncRelayCommand(InstallFileTypes);
             UninstallFileTypesMenuItem.Command = new AsyncRelayCommand(UninstallFileTypes);
             XciTrimmerMenuItem.Command = new AsyncRelayCommand(() => XCITrimmerWindow.Show(ViewModel));