I too am having issues after upgrading. Ran the upgrade, decided to remove gizmo as I'm not using it, and now I'm stuck with G5s that don't turn on. I did get an activation pop-up and did walk through it, and it shows as activated, but the G5s do not turn on. So while the installer hinted this should be seamless, there's something off I just clicked through and now have a not-functioning install. Let me know how I can help troubleshoot.
-mike