Thanks but it's still not working on my mac (OS Catalina). RM crashes as soon as I plug my Kemper...
Good news ! It now works !
The Kemper dev team inspected a backup of my Kemper and identified a couple of defective rigs. I erased them but RM was still crashing. I then erased all my rigs except the favorite (and I was ready to go all the way and erase everything!) and that did the trick ! Was there more defective rigs in the lot ? I don't know but the main thing is that it now works !
Thanks to all that expressed concern and thanks to the Kemper dev team !
And now, let's edit !