Hi signals, thanks for the reply. I have downloaded 5.0.1.2 and am having registration problems. But that can't be my only problem because when I copy a dvd and then try to burn, it still nags for a dual layer disc. I am going to remove the 5.0 and re-install, again. Is there procedure I'm not following correctly for upgrading the 4.0 to the 5.0? I will try anything at this point. thanks, Jim.