I updated to v14 and then restored the v12.5 backup, but it did NOT restore my license.
When I manually try to install the license, I first got the error "This license key is already activated on this server." (V14 is on a new Hyper-V machine, Windows 2008).
I went into the old VM and converted it to a free instance, but that did not solve the problem.
I deleted the blue keys from regedit, and now when I enter the key, it correctly displays my version until I leave the license window, when it reverts to a free instance.
Please help! Thanks!