The macOS Sierra 10.12.1 public beta train keeps chugging along, but my MacBook is stuck on 10.12.1 public beta 2 (16B2333a), which I installed over two weeks ago. Apparently [the current public beta is public beta 4](http://www.macrumors.com/2016/10/11/apple-seeds-macos-sierra-10-12-1-beta-4/).

I've tried going to System Preferences → App Store → Your computer is set to receive beta updates and toggling it off, then reinstalling the update enabler from [beta.apple.com](https://beta.apple.com/sp/betaprogram/guide#macos) to turn it back on (since the preference disappears when you turn it off.)

Is there any way to convince App Store to show me updates past public beta 2?