diff --git a/fclauncher/app.go b/fclauncher/app.go
index da33797..f2b3731 100644
--- a/fclauncher/app.go
+++ b/fclauncher/app.go
@@ -90,6 +90,7 @@ func (a *App) CheckPrerequisites() {
 			return
 		}
 	}
+	os.Remove(filepath.Join(dir, "FCLauncher", "authentication.json"))
 	os.MkdirAll(filepath.Join(dir, "FCLauncher"), 0755)
 	f, _ := os.OpenFile(filepath.Join(dir, "FCLauncher", "authentication.json"), os.O_CREATE|os.O_RDWR, 0755)
 	defer f.Close()