I was playing around with the (Dutch) translation, looking at 'all' the possibilities and at a certain moment pressed <Abandon unlimited license> under options:
It turned out to be a perfect way to 'kill' your license, that is: the program turned back to the limited version again.

Not only that but the named button also greyed out, so I couldn't get back to my licensed version again. :?
Of course I backed up by starting the official registration pocedure, which happily did work!
So, after all no big issue, but I think this should be looked after.
Thanks.
Regards,
Fred