Just wanted to share a little quirk. We just upgraded to FM16 and were trying to configure the email plug-in in Preferences (Mac and Windows, Pro and Adv users), and the license code wouldn't "stick". We would paste it in, click on Register, and go back in and it would be gone, although the company name appeared. We found that unchecking and re-checking the checkbox on the plug-in fixed it, it appeared permanently after that.

I've seen the same thing happen and it appears to be cosmetic when you register by script it returns a "1" (successful). However though it says demo on the license dialog. It does not expire in several hours like demo mode does and works normally.