static void ShowWindow()
{
// Get existing open window or if none, make a new one:
ReplaceGameObjects window = (ReplaceGameObjects)EditorWindow.GetWindow(typeof(ReplaceGameObjects));
window.Show();
}
static void CreateWizard()
{
ReplaceGameObjects window = ScriptableObject.CreateInstance(typeof(ReplaceGameObjects)) as ReplaceGameObjects;
window.ShowUtility();
}