So I downloaded the trial for Movie Studio Platinum, liked it, so I bought the full version today. And when I try to enter the serial code where prompted, it says the program has to reset, and when it does it keeps bringing me back to the "Your trial has expired" screen.

I've spent the past few hours looking for an answer on the internet, I was in the middle of a project that I really need to finish today, so I'd really appreciate any help.