I use FMPro 14 on a Macintosh with High Sierra. I have just moved the system and my apps to a new startup disk. FileMaker now asks for the license key. I have this on record, and it corresponds to the key shown in the "About" box if I start the computer from the old startup disk which contains my old copy of FileMaker. But FileMaker claims that it is only an "upgrade" key which is not valid.
So I went and got the box for the last version I ever bought on DVD (version 11) but that key does not work either.
Where can I find this essential info?