I see the issue -- it's not a Windows issue but a problem with mouse wheel scrolling within UR. I believe it was introduced with this change in March:
Mouse wheel scrolling in trees and lists not working correctly for 'Screen at a time' setting.* [5.4.0.5]
For now, either use the keyboard or scroll bar instead of the mouse wheel, or here is a download of v5.3.
https://www.kinook.com/Download/Old/...ecallPro53.exe
We will investigate.