Same issue here that has only happened now that I have bought Pro 10 - it will not load - gets started, loads a few things and then hangs.
Message after a force quit comes up with Synsopsis.app cannot be found etc.
Weird thing is 9.5 works, so guessing the eLicenser must be ok.
So far have deleted preferences, removed and reinstalled the eLicenser and even reloaded Mojave itself.