Upgraded from Artist 4 to Studio One Pro 4 and can't get the Pro version to show up.

I upgraded from artist to professional. I download the file and it downloads fine. When I try to register the product is says the register key is already registered. If I try to activate off line it does the same thing.  My artist version is still showing up and pro version isn't showing.  I have all of the downloads that came with it. Not sure what to do.