I went out today A bought Bryce 5 upgrade,When I enter the # that came with it its fine,but when I enter the Bryce 4 serial #,it say's it is an invalid serial #.I tried to call Corel and of course they are closed.The Bryce 4 I have is an legit full version,I don't know why bryce5 say's it is not A valid #.I will call Corel Monday,but I was just wondering If any bodyelse had any problems?