last night i installed sony vegas 14 that i got from the humble bundle. i ended up having to set my system back a few days because reasons and lost the files, well after trying to reinstall im asked to register. although the serial number/key has already been used. ive tried going to my account and installing it from there but that didnt work.

note: i was "given" vegas14 by a friend who actually bought the bundle, id rather not annoy him more but if need be then on well