You will need to contact billing and get some kind of proof of purchase ive tried multiple times to get my registration code. They said unless you get proof "you might have to repurchase the game" oh they'll push that one a lot. My exact situation is I purchased 1.0 and tried to put my card info in to keep playing. Nope, for some reason the webpage doesn't recognize my ownership of it even though its clearly says account created on Nov. 17 2012. Seriously, good luck to you getting your code. You and I will need it.