Yesterday I first deleted about 300 rigs with RM for Mac beta and all the rigs were still there after switching my KPA on again.
Then I did the same with RM for Windows and now it gets really mysterious: I still could see the names of the deleted rigs on my KPA, but I couldn't load them anymore. So I had to delete everything manually again, this was a lot of wasted time...
I think RM stil is very buggy and I don't like "mysterious" things happening while using a software. I'll stay away from using RM in the future, it's ok for getting an overview of your profiles, but it doesn't work properly.