Ran into the same after upgrade.
Try to backup system, reinstall overwriting current install, then load backup.
That worked for me, but i have read other posts stating a clean install is necessery.
I totally agree on the license issue.
Specially for us that have several boxes for testing and trying.
Estimated figures we have to install/reinstall 10 to 15 times a day..
However i see the logic in those who have used a lisence, and dont want to renew it after it expires.
A possible solution for this could be to let backup take the key, and make a "Unload Key" button in management console. (This probably should be in future request forum) :roll: