Hi,
I have a wacom 16" mobile pro machine with 4k resolution. I just installed Studio and the buttons are so tiny and the text is not really usable on the side menues. For example clarity. On the right side I can see color but Hue Saturation and Brightness are over each other. Below over saturation is visible but the slider is on the word saturation and I can’t read the values next to it.
I think they will need more information on your setup including video drivers and card. I have a 32" 4K monitor and all works perfectly. I also do not recall reading of any problems lately with 4K.
I have exactly the same issue and stopeed usig Topaz for over 1 year…thought there would have been a fix by now…all drivers are up to date and the product is not usable which is very frustrating.