Hi David
THe 'Repair option' is in the beta UI but it's just not functional yet.
I 'originally' pointed that out because I stumbled across it and didn't realize it wasn't functional
I guess they resolved the fact that it wasn't functional by removing it
Unlike you I have gone in the opposite direction, I no longer run the beta builds. I got fed up of the inconsistencies, were something was functioning OK only to be screwed up in a beta release.
Currently I'm only running the latest version on my XP Pro system (much better backup and recovery strategy in place) and not on my win10 system. It has got to that point were I now wait to see what transpires in the forums before I manually update. I may however have to do that before I allow the next win10 program update.