i just bought an imac and downloaded a photoshop cs2 program, registered it with the serial number that came with it and followed every step up untill the activation. 2 days later i deleted it and all files that came with it, now I have a copy of my girlfriends photoshop cs2 program but whenever i try to open it it keeps reading it as the first photoshop i got, and therefore wont open, im thinkin of just reformatting my mac so that i can start over again but im wondering if ne of you can help 
