The Grand 3 not win 10 compatible?

I have installed The Grand 3 and updated to the newest version (around the 20th of April 2016).
Trying the Standalone and the VST Version in Studio one (newest)- BOTH show the same behavior:

apart from not being very touchscreen friendly I can’t seam to open any instruments inside the gui of the Grand.
Neither with touchscreen, nor with mouse or graphic tablet. The Grand is installed correctly, but upon
trying to open any of the pianos, close or open, nothing happens. The picutes of the pianos unfold…but that was about it.

Under win7 I have had no problems so far.

Using 64bit Win10 and StudioOne.
Does anyone have Grand 3 running completely WITH loaded playable instruments?