I have just rebuilt by computer and among the games I am installing again is GSD. I thought I downloaded a demo that I could activate, but apparently what I just installed is a 30 days/1 hour demo with limited cars and tracks. When I launch it it tells me to download the final version and there is no place for me to enter my serial number. Unfortunately, I don't have the original installation files, while I do have the update to 2012. Where do I go to download the GSD 2012 version I can reactivate?