After updating to Windows 10 my system works just as before except for Archicad 18 (FIN, r6000).
a) When selecting an object in the viewport, there is a 4-10 second pause of Arhicad being unresponsive.
b) I can click and right-click the Contents window tree, but am not able to double-click (to open a view) or drag them (to arrange content on sheets)
