@domdis you can see the version from 1.0.18 in the operator dashboard footer.
You can see also UVdesk release here: https://github.com/uvdesk/community-skeleton/releases
You should remember if updated or not.
Previous UVdesk version never had the version showed in the Dasboard footer.
Also I'd like to know how much time per organization / customer
I don't know if this feature is available, maybe not but let's wait a developer reply.