I have never done something like this before: Am I supposed to back up my savegame files? If yes, where are they? Do I just go to the site where I downloaded the game and re-download it? Or should I see if I can find my Proof of Purchase and have you folks at LDW help me? I have never done something like this before, and as such, I am totally clueless about what I should do.

Please, and thank you in advance.