I recently attended a Camp Logos workshop in Las Vegas and purchased the Logos 4 upgrade for PC, hoping to upgrade from version 3 to version 4 on my Mac using Parallels. When I bought the disc I thought it was unusual to have the Windows 4.0 and the Mac 4.0 Alpha version on the same disc, which may be the problem. Only the Mac 4.0 Alpha version will install on my Macs. I am running Parallels 5.0 with Windows XP. Can you help? Thanks