I found that GUI problems with plugins sometimes can be fixed with the latest graphics drivers, Visual basics, Download and install them all fresh from microsoft, both x86 and x64 versions. Deinstall the old ones first, and install in a sequential order; VSbasic 2015 won't install over 2017 BTW. Also for DotNet.

This as you run Windows 10 64 bit. 1803 (Fall Creators) runs fine; i wouldn't install a later Windows 10 version BTW. Switch off Windows Update with Windows Update Switch if needed.

Then if your graphics drivers/settings allow it: switch off hardware acceleration ...

I bought Sampletank 2 and 3 and Omnisynth in the past, and always had IKmultimedia problems due their activation. -F