Interesting. I just recently purchased VEP7, so the only version I have is the new iLok version. I did use the Vienna Assistant to do the VEP installation.
The MAS plugins for VEP show in the DP Plug-ins window in DP Preferences. There are two of them (Vienna Ensemble Pro and Vienna Ensemble Pro Audio Input). However when you try to actually add a plugin to a project, only the first one (Vienna Ensemble Pro) shows as an option. Because of all the issues I've had with the MAS version, I have disabled both plugs in DP.
I also have both Synchron Player and Synchron Harp and neither of those show as an MAS plugin, just AU and VST.