The Frustrations of App Store Licensing
Regrettably, what this issue really needs is a more flexible policy from Apple—a method that anyone can use to transfer licenses, not just those who qualify for Apple’s volume purchase programs for business or education. It wasn’t such a big deal with iOS apps in that the vast majority aren’t intended for business use, but with the advent of Mountain Lion and Apple’s push to direct users to the Mac App Store (and the many business applications within) there needs to be a method for license transfer for everyone.
You can do it via Apple Configurator, but it sounds like it’s a pain.
