I was a public beta tester. Took my computer off beta updates after the GM version. Installed the normal version of Sierra on release day. This morning I woke up and my computer has restarted, and without asking has installed 10.12.1 public beta. This was kind of annoying because I had a lot of applications and tabs open and not all reopened. I checked preferences etc and I'm not on beta updates. Any ideas about how to get off the beta treadmill?