I bought the Bosey Upright and installed NKS for it and Vienna Assistant hung on it. After over an hour I force quit it. When I relaunched Komplete Kontrol app and re-scanned most of my NKS had disappeared. I looked in the System vol/Library/Application Support/Native Instruments/Service Center all of my NKS XML files had been DELETED.
I can't be 100% certain it was Vienna Assistant that did this, I am just reporting what I'm seeing. This will be very extremely costly to rebuild as I don't back up things like this which I can't imagine getting wiped out like this. Please examine this bug. It could possibly be on Native Instruments' side as they are having serious problems getting KK3 built and stable. I'm using latest of everything on Mac M1.