Hi Paul -
Good question! Yes, in fact I had just applied the latest Windows 10 updates (2018-03) just BEFORE downloading and installing updates to all things VSL, and the Synchron Pianos Yamaha library. The PC reported its Windows update status to be "up to date" before installing Synchron Pianos, and again late yesterday afternoon just before my first reply to this thread, and again this afternoon. HOWEVER, I just now clicked "check for updates" again and ... PC is downloading another 2018-03 update (KB4088891). I think you may be onto something here, so let me get this update installed and see what happens (it's a slooooow download ...) Was that part of the update set that you had on board in your shop before releasing Synchron Pianos?
Thanks again,
Craig