I've gotten a crash after renaming a rig on RM in previous versions. You just turn off profiler and shut down RM and restart everything.
It only happened once to me too, and i did he same thing, seems stable now. Still some amps with the locked volume drop, but it`s not on any amps i actually use, so i don´t mind that much. It`s just the eerie feeling that there is a bug lurking in my Kemper... Not a happy feeling.
I upgraded today, and i got the same issue. + I can not change the rig on the hardware. It`s stuck on one RIG, i am only able to change it on the Rig Manager. Extremely annoying. Also the rig crashed once with an error message on the display. Wish i had checked before updating, unfortunately i did not. I just updated because the Rig Manager forced me to if i wanted to use it...
Edit:
I found the reason for not being able to change Rig on the hardware.
It had changed from "All Rigs", to "Last imported" (Upper left button over the display)
Hope this helps someone 
