Okay, I have installed Nuendo 6.5.4.0 and activated a trial of VST Connect Pro 3.01.
The promised menu does not show up, it just is not where it is in the demo video on the Steinberg page.
So I tried to go the manual way that was described for version 2 and as soon as I insert the VST Connect PRO insert into an input channel I get a crash that sends Nuendo into a void that needs to be forced to quit.
Oh, sorry. We missed that one. Again, we are really sorry for that. A fix is already done, but it takes a bit before it goes online. Meanwhile … can you send me a PM (private message)? We’ll have a workaround for you.