I received the same error as Warren B, but I used the Repair/Upgrade option to do the install. I aborted the install when I received the error, since I need Photo Mechanic to work for me over the next two weeks. In other words, I can go on using the previous build. I would like to hear from Camera Bits, if this error can be ignored without any detriment to Photo Mechanic's proper functionality before I update to the newest version.
Thanks