Problem downloading

Hey, I have a bit of a problem. I had to wipe my computer, and in doing so I lost my install of GSB. I tried to re-download it, but my password for the download expired. Is there anything I can do, or would I have to re-purchase the game?

just email using the email address you used when you bought the game

Okay, I sent the email, plus the recipt I got after purchasing the game.