Hi all, I downloaded and installed Home Premium 64bit from the student download and have since realized that I need the Professional functionality. I have contacted Digital River, and they said that they have begun a refund and they have opened my student ID back up so I can go back and buy the Professional version I need. So... once I download this, is it going to be a problem to install Pro over Home Premium? Both are 64 bit, but I don't know how the upgrades work. Any insight would be appreciated... I just don't know if I can just do an upgrade or if I need to do a custom install (or, surely not, go back to XP first and then do a custom install). Thanks!