Ok i purchased guitar pro back in december. My computer recently crashed and I had to reinstall my windows. Now I have the user and key id in my email. But when I enter those along with the other information it says "This license number has already been registered. Please use the Modify/Delete my registration menu" but I dont see any menu. Can anyone help?
You could e-mail Guitar Pro and ask for another copy.

Or *cough* buy *cough* another one.