I am looking to upgrade from VMWare Fusion to Parallels Pro. I just purchased an upgrade version thinking that you offered a competetive upgrade. The license screen isn't accepting my VMWare fusion license key. I'm not sure where I got the idea that I could upgrade from Fusion and get the upgrade price of Parallels. But that's what I've done. So, is there a way that I can get the upgrade copy of Parallels that I just bought to work only having a VMWare Fusion license key?