Hi was wondering how to upgrade to version 3186. I bought my copy of parallels from the apple store which was the wrong one for my intel core 2 duo imac, but parallels sent me a link to download build 1970. So I have that build up and running with xp home, was wondering if I instal build 3186/ 1. will it upgade my current version without having to reinstal xp and 2. will my product code work with this build.