Add errors when loading from elsewhere than installedPlugins or devPlugins/Penumbra existing and containing dlls in Release mode

Penumbra/Penumbra.cs

@@ -29,10 +29,14 @@ public class MainClass : IDalamudPlugin
 {
     private          Penumbra?        _penumbra;
     private readonly CharacterUtility _characterUtility;
+    public static    bool             DevPenumbraExists;
+    public static    bool             IsNotInstalledPenumbra;
 
     public MainClass( DalamudPluginInterface pluginInterface )
     {
         Dalamud.Initialize( pluginInterface );
+        DevPenumbraExists      = CheckDevPluginPenumbra();
+        IsNotInstalledPenumbra = CheckIsNotInstalled();
         GameData.GameData.GetIdentifier( Dalamud.GameData, Dalamud.ClientState.ClientLanguage );
         _characterUtility = new CharacterUtility();
         _characterUtility.LoadingFinished += ()
@@ -47,6 +51,38 @@ public class MainClass : IDalamudPlugin
 
     public string Name
         => Penumbra.Name;
+
+    // Because remnants of penumbra in devPlugins cause issues, we check for them to warn users to remove them.
+    private static bool CheckDevPluginPenumbra()
+    {
+#if !DEBUG
+        var path = Path.Combine( Dalamud.PluginInterface.DalamudAssetDirectory.Parent?.FullName ?? "INVALIDPATH", "devPlugins", "Penumbra" );
+        var dir  = new DirectoryInfo( path );
+
+        try
+        {
+            return dir.Exists && dir.EnumerateFiles( "*.dll", SearchOption.AllDirectories ).Any();
+        }
+        catch( Exception e )
+        {
+            PluginLog.Error( $"Could not check for dev plugin Penumbra:\n{e}" );
+            return true;
+        }
+#else
+        return false;
+#endif
+    }
+
+    // Check if the loaded version of penumbra itself is in devPlugins.
+    private static bool CheckIsNotInstalled()
+    {
+#if !DEBUG
+        return !Dalamud.PluginInterface.AssemblyLocation.Directory?.Parent?.Name.Equals( "installedPlugins",
+            StringComparison.InvariantCultureIgnoreCase ) ?? true;
+#else
+        return false;
+#endif
+    }
 }
 
 public class Penumbra : IDisposable
@@ -71,7 +107,6 @@ public class Penumbra : IDisposable
     public static FrameworkManager Framework { get; private set; } = null!;
     public static int ImcExceptions = 0;
 
-
     public readonly  ResourceLogger ResourceLogger;
     public readonly  PathResolver   PathResolver;
     public readonly  MusicManager   MusicManager;

Penumbra/UI/ConfigWindow.Misc.cs

@@ -139,6 +139,9 @@ public partial class ConfigWindow
             }
         }
 
+        // Add Penumbra Root. This is not updated if the root changes right now.
+        fileManager.CustomSideBarItems.Add( ("Root Directory", Penumbra.Config.ModDirectory, FontAwesomeIcon.Gamepad, 0) );
+
         // Remove Videos and Music.
         fileManager.CustomSideBarItems.Add( ( "Videos", string.Empty, 0, -1 ) );
         fileManager.CustomSideBarItems.Add( ( "Music", string.Empty, 0, -1 ) );

Penumbra/UI/ConfigWindow.cs

@@ -55,23 +55,29 @@ public sealed partial class ConfigWindow : Window, IDisposable
         {
             if( Penumbra.ImcExceptions > 0 )
             {
-                using var color = ImRaii.PushColor( ImGuiCol.Text, Colors.RegexWarningBorder );
+                DrawProblemWindow( $"There were {Penumbra.ImcExceptions} errors while trying to load IMC files from the game data.\n"
-                ImGui.NewLine();
-                ImGui.NewLine();
-                ImGui.TextWrapped( $"There were {Penumbra.ImcExceptions} errors while trying to load IMC files from the game data.\n"
                   + "This usually means that your game installation was corrupted by updating the game while having TexTools mods still active.\n"
                   + "It is recommended to not use TexTools and Penumbra (or other Lumina-based tools) at the same time.\n\n"
                   + "Please use the Launcher's Repair Game Files function to repair your client installation." );
-                color.Pop();
-
-                ImGui.NewLine();
-                ImGui.NewLine();
-                SettingsTab.DrawDiscordButton( 0 );
-                ImGui.SameLine();
-                SettingsTab.DrawSupportButton();
-                return;
             }
-
+            else if( MainClass.IsNotInstalledPenumbra )
+            {
+                DrawProblemWindow(
+                    $"You are loading a release version of Penumbra from \"{Dalamud.PluginInterface.AssemblyLocation.Directory?.FullName ?? "Unknown"}\" instead of the installedPlugins directory.\n\n"
+                  + "You should not install Penumbra manually, but rather add the plugin repository under settings and then install it via the plugin installer.\n\n"
+                  + "If you do not know how to do this, please take a look at the readme in Penumbras github repository or join us in discord.\n"
+                  + "If you are developing for Penumbra and see this, you should compile your version in debug mode to avoid it." );
+            }
+            else if( MainClass.DevPenumbraExists )
+            {
+                DrawProblemWindow(
+                    $"You are loading a installed version of Penumbra from \"{Dalamud.PluginInterface.AssemblyLocation.Directory?.FullName ?? "Unknown"}\", "
+                  + "but also still have some remnants of a custom install of Penumbra in your devPlugins folder.\n\n"
+                  + "This can cause some issues, so please go to your \"%%appdata%%\\XIVLauncher\\devPlugins\" folder and delete the Penumbra folder from there.\n\n"
+                  + "If you are developing for Penumbra, try to avoid mixing versions. This warning will not appear if compiled in Debug mode." );
+            }
+            else
+            {
                 using var bar = ImRaii.TabBar( string.Empty, ImGuiTabBarFlags.NoTooltip );
                 SetupSizes();
                 _settingsTab.Draw();
@@ -82,12 +88,28 @@ public sealed partial class ConfigWindow : Window, IDisposable
                 _debugTab.Draw();
                 _resourceTab.Draw();
             }
+        }
         catch( Exception e )
         {
             PluginLog.Error( $"Exception thrown during UI Render:\n{e}" );
         }
     }
 
+    private static void DrawProblemWindow( string text )
+    {
+        using var color = ImRaii.PushColor( ImGuiCol.Text, Colors.RegexWarningBorder );
+        ImGui.NewLine();
+        ImGui.NewLine();
+        ImGui.TextWrapped( text );
+        color.Pop();
+
+        ImGui.NewLine();
+        ImGui.NewLine();
+        SettingsTab.DrawDiscordButton( 0 );
+        ImGui.SameLine();
+        SettingsTab.DrawSupportButton();
+    }
+
     public void Dispose()
     {
         _selector.Dispose();