Okay, here is what happened ... I let Windows 10 update again to its satisfaction ... so now I am Version 1703, OS Build 15063.994 ... dowloaded fresh copy of Synchron Pianos software installer, reinstalled over the existing ... restarted PC between each of these steps ... tried Synchron Pianos plugin both within Cubase and within VEPro6 ... I still get GUI freeze when I click on the Settings icon, but now the Size and CPU icons work properly. I can load a preset, change presets and tweak parameters as long as I have not "touched" the Settings icon, so the only functionality that is still unavailable to me is everything under the Settings icon. Obviously the player is finding the samples just fine. Perhaps my PC is a "slow learner" (or at least a slow adopter) with respect to Windows updates and it will decide that more are available in the next few days ... does Synchron Pianos require the "Windows 10 April update" or should my version and build above support Synchron Pianos?
Making progress and sounding great, so I will see what shakes out with subsequent Windows updates. I would be curious to hear whether you think that this looks like a pure Windows 10 issue ... that would make sense if my PC is emulating bugs that you saw before the latest and greatest updates ... and others with PCs that are quicker to adopt updates are not reporting anything similar.
Cheers, πΊ Craig
Amber Ale or Porter, that is the question now.