so couple months ago i upgraded my operating system to snow leopard, when i did this my parallels stop opening. I looked it up and said that i needed to update parallels as well. I have Parallels for mac 4.0 my question is do i buy the upgrade or do i have to buy the whole parallels all over again? i am asking this because on the Parallels site it said if you have 2,3, or 4 you need to buy Parallels 7 full. And if i buy the upgrade do i need my original like serial code or anything like that? because i had someone else purchase and install parallels for me so i dont have anything like that.
