I hope this isn't a stupid question but considering the fact that I'm mostly new to computer gaming, I'm a little uninformed. I've pre-ordered Diablo 3 (digital download) and I'm going to install it on my PC as soon as it comes out. As soon as the new Macbook Pros come out, I'll be getting one for college though. I was wondering if I could later install Diablo 3 on my Mac again or would they charge me for another license/game? Thanks in advance!