diff --git a/PKHeX.WinForms/MainWindow/Main.cs b/PKHeX.WinForms/MainWindow/Main.cs
index 5ee887666..3da69a224 100644
--- a/PKHeX.WinForms/MainWindow/Main.cs
+++ b/PKHeX.WinForms/MainWindow/Main.cs
@@ -149,8 +149,7 @@ public Main()
             #endregion
             #region Localize & Populate Fields
             string[] args = Environment.GetCommandLineArgs();
-            string filename = args.Length > 0 ? Path.GetFileNameWithoutExtension(args[0])?.ToLower() : "";
-            HaX = filename?.IndexOf("hax", StringComparison.Ordinal) >= 0;
+            HaX = args.Any(x => x.Trim('-').ToLower() == "hax");
 
             bool showChangelog = false;
             bool BAKprompt = false;