here u go frakits

source/funkin/backend/system/MainState.hx

@@ -5,8 +5,10 @@ import sys.FileSystem;
 #end
 import flixel.FlxState;
 import funkin.backend.assets.ModsFolder;
+import funkin.backend.assets.ModsFolderLibrary;
 import funkin.backend.chart.EventsData;
 import funkin.backend.system.framerate.Framerate;
+import funkin.editors.ModConfigWarning;
 import funkin.menus.TitleState;
 import haxe.io.Path;
 
@@ -112,10 +114,23 @@ class MainState extends FlxState {
 		if (Framerate.isLoaded)
 			Framerate.instance.reload();
 
-		FlxG.switchState(new TitleState());
-
 		#if sys
 		CoolUtil.safeAddAttributes('./.temp/', NativeAPI.FileAttribute.HIDDEN);
 		#end
+
+		if (Options.devMode) {
+			var lib:ModsFolderLibrary;
+			for (e in Paths.assetsTree.libraries) {
+				@:privateAccess if (!(e is openfl.utils.AssetLibrary) || !((lib = cast cast(e, openfl.utils.AssetLibrary).__proxy) is ModsFolderLibrary)) continue;
+				if (lib.modName == ModsFolder.currentModFolder) {
+					if (lib.exists(Paths.ini("config/modpack"), lime.utils.AssetType.TEXT)) break;
+
+					FlxG.switchState(new ModConfigWarning(lib));
+					return;
+				}
+			}
+		}
+
+		FlxG.switchState(new TitleState());
 	}
 }

source/funkin/editors/ModConfigWarning.hx

@@ -1,9 +1,15 @@
 package funkin.editors;
 
-class ModConfigWarning extends UIState {
+import funkin.backend.assets.ModsFolderLibrary;
+import flixel.FlxState;
 
-	var libraryToMakeConfigIn:Dynamic = null;
-	public static var defaultModConfigText = 
+class ModConfigWarning extends UIState {
+	public static var hadPopup:Bool = false;
+
+	var library:ModsFolderLibrary = null;
+	var goToState:Class<FlxState>;
+
+	public static inline var defaultModConfigText = 
 '[Common]
 MOD_NAME="YOUR MOD NAME HERE"
 MOD_DESCRIPTION="YOUR MOD DESCRIPTION HERE"
@@ -26,49 +32,43 @@ DISABLE_BETA_WARNING_SCREEN=true
 MOD_DISCORD_CLIENT_ID=""
 MOD_DISCORD_LOGO_KEY=""';
 
-	public function new(library) {
+	public function new(library:ModsFolderLibrary, ?goToState:Class<FlxState>) {
 		super();
-
-		libraryToMakeConfigIn = library;
+		this.library = library;
+		this.goToState = goToState != null ? goToState : funkin.menus.TitleState;
 	}
 
-	override function create() {
-		super.create();
+	override function createPost() {
+		super.createPost();
+		hadPopup = true;
 
-		openSubState(new UIWarningSubstate("Missing mod config!", "Your mod is currently missing a mod config file!\n\n\nWould you like to automatically generate one?\n\n(PS: If this is not your mod please disable Developer mode to stop this popup from appearing.)",
-		[
+		var substate = new UIWarningSubstate("Missing mod folder configuration!", "Your mod is currently missing a mod config file!\n\n\nWould you like to automatically generate one?\n\n(PS: If this is not your mod please disable Developer mode to stop this popup from appearing.)", [
 			{
 				label: "Not Now",
 				color: 0x969533,
 				onClick: function (_) {
-					funkin.menus.MainMenuState.hadPopup = true;
-					MusicBeatState.skipTransIn = false;
-					MusicBeatState.skipTransOut = false;
-					FlxG.switchState(new funkin.menus.MainMenuState());
+					MusicBeatState.skipTransOut = MusicBeatState.skipTransIn = false;
+					FlxG.switchState(cast Type.createInstance(goToState, []));
 				}
 			},
 			{
 				label: "Yes",
 				onClick: function(_) {
-					trace(libraryToMakeConfigIn.getPath("data/config/modpack.ini"));
-					sys.io.File.saveContent(libraryToMakeConfigIn.getPath("data/config/modpack.ini"), defaultModConfigText);
-					openSubState(new UIWarningSubstate("Created mod config!", "Your mod config file has been created at " + libraryToMakeConfigIn.getPath("data/config/modpack.ini") + "!", [
+					var path = '${library.folderPath}/data/config/modpack.ini';
+					CoolUtil.safeSaveFile(path, defaultModConfigText);
+					openSubState(new UIWarningSubstate("Created mod config!", "Your mod config file has been created at " + path + "!", [
 						{
 							label: "Ok",
 							onClick: function (_) {
-								funkin.menus.MainMenuState.hadPopup = true;
-								MusicBeatState.skipTransIn = false;
-								MusicBeatState.skipTransOut = false;
-								FlxG.switchState(new funkin.menus.MainMenuState());
+								MusicBeatState.skipTransOut = MusicBeatState.skipTransIn = false;
+								FlxG.switchState(cast Type.createInstance(goToState, []));
 							}
 						},
 					], false));
 				}
 			}
-		], false));
-	}
-
-	override function update(elapsed) {
-		super.update(elapsed);
+		], false);
+		substate.bHeight = 300;
+		openSubState(substate);
 	}
 }

source/funkin/editors/ui/UIWarningSubstate.hx

@@ -32,6 +32,8 @@ class UIWarningSubstate extends MusicBeatSubstate {
 
 	var warnCam:FlxCamera;
 
+	public var bHeight:Int = 232;
+
 	public override function onSubstateOpen() {
 		super.onSubstateOpen();
 		parent.persistentUpdate = false;
@@ -69,7 +71,7 @@ class UIWarningSubstate extends MusicBeatSubstate {
 		warnCam.zoom = 0.1;
 		FlxG.cameras.add(warnCam, false);
 
-		var spr = new UISliceSprite(0, 0, CoolUtil.maxInt(560, 30 + (170 * buttons.length)), 232, 'editors/ui/${isError ? "normal" : "grayscale"}-popup');
+		var spr = new UISliceSprite(0, 0, CoolUtil.maxInt(560, 30 + (170 * buttons.length)), bHeight, 'editors/ui/${isError ? "normal" : "grayscale"}-popup');
 		spr.x = (FlxG.width - spr.bWidth) / 2;
 		spr.y = (FlxG.height - spr.bHeight) / 2;
 		spr.color = isError ? 0xFFFF0000 : 0xFFFFFF00;

source/funkin/menus/MainMenuState.hx

@@ -27,8 +27,6 @@ class MainMenuState extends MusicBeatState
 
 	public var canAccessDebugMenus:Bool = !Flags.DISABLE_EDITORS;
 
-	public static var hadPopup = false;
-
 	override function create()
 	{
 
@@ -82,23 +80,6 @@ class MainMenuState extends MusicBeatState
 		add(versionText);
 
 		changeItem();
-
-		if (Options.devMode && !MainMenuState.hadPopup)
-			for (i in Paths.assetsTree.libraries) {
-				var l = i;
-				if (l is openfl.utils.AssetLibrary) {
-					@:privateAccess
-					l = cast(l, openfl.utils.AssetLibrary).__proxy;
-				}
-				if (cast(l, funkin.backend.assets.IModsAssetLibrary).modName == funkin.backend.assets.ModsFolder.currentModFolder) {
-					if (!l.exists(Paths.getPath("data/config/modpack.ini"), lime.utils.AssetType.TEXT)) {
-						MusicBeatState.skipTransIn = true;
-						MusicBeatState.skipTransOut = true;
-						FlxG.switchState(new funkin.editors.ModConfigWarning(l));
-					}
-					break;
-				}
-			}
 	}
 
 	var selectedSomethin:Bool = false;