public static void OpenWindow()
 {
     if (Instance == null)
     {
         Instance = EditorWindow.GetWindow <KEngineInstallerEditor>(true, "KEngine Installer");
     }
     Instance.Show();
 }
 public static void OpenWindow()
 {
     if (Instance == null)
     {
         Instance = EditorWindow.GetWindow<KEngineInstallerEditor>(true, "KEngine Installer");
     }
     Instance.Show();
 }