OK, in the end the procedure for updating VB3-II from 2.0.0 to 2.1.0 is the same as I described in VB3-II 2023 released - #40 by tripleB
Additionally I made temp. GP plugin presets for the VB3-II for each rackspace before updating the VB3-II plugin.
After the update I reloaded the plugin preset in the temporary variation before i started the remapping.
Everything fine so far VB3-II 2.1.0 up and running in my main gig-file 
Edit: I also updated the Simple VB3-II example