Hi i'm currently using AE 6.5 pro(mac) and wondering if i can buy the CS3 upgrade version for it? I went down to the software store recently and the sales guy said i would need the full retail version because the CS3 upgrade needs at least AE7 installed.
It's no problem to do a cross-platform upgrade, but you have to speak to Adobe Customer Service in order to do so. You'll have to sign a notice of destruction and fax/email it back. There is no difference in the upgrade price.