Welp...on the way home from the studio this evening I think I figured out what has happened. It's actually a case of fool me once/fool me twice as I remember this happened once before and our ol pal Larry was kind enough to forward me the missing dll files...which worked back then. But now I know what caused this. And it's not just Maschine...its every single NI instrument I updated this morning.
My internet connect is so slow at the studio I let it run overnight to download the couple of gigs worth of updates using NI's service center. When I got to work everything was downloaded, each with an "install" button beside them. Which I clicked, one after the other, letting them install.
That's the problem. If you don't choose to manually install you don't get an option to select your VST path and the installer puts all the (now removed) dll files in the wrong location...or nowhere at all as their are no dll files of any of the missing instruments where NI says they default to either.
What I suspect I'll have to do is figure out what all instruments are screwed, redownload all those updates...this time directly from my account at NI...and at home where I've got good internet speed...and then take all the zip files to the studio...unzip and manually install each one telling the installer where to correctly put the dll files. What a pain.
So....if any of you great fellers or gals are thinking of updating your NI instruments using the Service Center AND you keep your VSTs in a proprietary folder DO NOT let the Service Center install them...do it manually!