I'm sorry to revive this thread, but I have the same problem.
I started the computer (I can't remember what I made yesterday, but I think that is nothing with FC) and when I try to start de FC GUI, it says that trial perior has ended.

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How it see now
I tried to Unnistall, restart computer, Install, and restart computer (2 times that cycle). And, before that, I Unnistalled and installed without restart (of course, it don't work xD).
The trial perior before that was about 100 days (little more).
Thanks in advance (and sorry for my english in this post and nexts posts).
If it can help:
Win 7 Ultimate
4 GB ram DDR2 (trademarks needed?)
CPU AMD athlon x2 6000+ without overclock
"Standard HDDs" and drive C: with a SSD (crucial v4 128GB) Firmware Ver. M22 (Failed with this version) and after backup the SSD, actualizated to M25 and restored the backup. The problem started after the actualization
Motherboard MSI K9Neo V2
Thanks again.