Check if game update exists before loading the application.

src/Ryujinx.Ui.Common/App/ApplicationLibrary.cs

@@ -928,6 +928,12 @@ namespace Ryujinx.Ui.App.Common
                 {
                     updatePath = JsonHelper.DeserializeFromFile(titleUpdateMetadataPath, _titleSerializerContext.TitleUpdateMetadata).Selected;
 
+                    if (!string.IsNullOrWhiteSpace(updatePath)
+                        && !File.Exists(updatePath))
+                    {
+                        Logger.Warning?.Print(LogClass.Loader, $"Update file {updatePath} for titleId: {titleId} was not found! Game saves can become corrupted!");
+                    }
+
                     if (File.Exists(updatePath))
                     {
                         FileStream file = new(updatePath, FileMode.Open, FileAccess.Read);

src/Ryujinx/Ui/MainWindow.cs

@@ -896,6 +896,11 @@ namespace Ryujinx.Ui
             }
             else
             {
+                if (!CheckGameUpdatesPresent())
+                {
+                    return;
+                }
+
                 PerformanceCheck();
 
                 Logger.RestartTime();
@@ -959,6 +964,36 @@ namespace Ryujinx.Ui
             }
         }
 
+        private bool CheckGameUpdatesPresent()
+        {
+            bool gameUpdateStatusCheck = true;
+
+            _gameTableSelection.GetSelected(out TreeIter treeIter);
+            string titleId = _tableStore.GetValue(treeIter, 2).ToString().Split("\n")[1].ToLower();
+
+            (Nca patchNca, _) = ApplicationLibrary.GetGameUpdateData(_virtualFileSystem, titleId, 0, out string updatePath);
+
+            if (!string.IsNullOrWhiteSpace(updatePath)
+                && patchNca is null)
+            {
+                MessageDialog updateMissingWarningDialog = new(this, DialogFlags.Modal, MessageType.Warning, ButtonsType.YesNo, null)
+                {
+                    Title = "Ryujinx - Warning",
+                    Text = "Update file for this title was not found!",
+                    SecondaryText = "Game saves may be incompatible with this version or become corrupted. Do you wish to load the application anyway?",
+                };
+
+                if (updateMissingWarningDialog.Run() == (int)ResponseType.No)
+                {
+                    gameUpdateStatusCheck = false;
+                }
+
+                updateMissingWarningDialog.Dispose();
+            }
+
+            return gameUpdateStatusCheck;
+        }
+
         private RendererWidgetBase CreateRendererWidget()
         {
             if (ConfigurationState.Instance.Graphics.GraphicsBackend == GraphicsBackend.Vulkan)

src/Ryujinx/Ui/Windows/TitleUpdateWindow.cs

@@ -86,6 +86,12 @@ namespace Ryujinx.Ui.Windows
 
         private void AddUpdate(string path)
         {
+            if (!File.Exists(path))
+            {
+                GtkDialog.CreateErrorDialog($"Update file {path} was not found! Current game saves can become corrupted!");
+                return;
+            }
+
             if (File.Exists(path))
             {
                 using FileStream file = new(path, FileMode.Open, FileAccess.Read);