If you're having uEFI BIOS and tried to install GearLock 6.3, the installation might fail and GearLock may not work properly. So, under such circumstances you can try 6.2 and it should work fine. The reason I'm saying this is because you can't expect a bugfix update for this any sooner than 10 days or more.
To get 6.2, click on RELEASES tab.