[Zubersoft]

Can you please long press the application icon on the home page and turn off any of the optimizations (other than DPI which you can leave if you prefer). This looks to me like an optimization issue. You may find with the latest build (which I just published shortly after your post), the problem may be gone even with optimizations on, as I switched the background image when a tool is selected to just be a square border.

If my latest build doesn't fix the issue, and turning off optimizations doesn't either, then I can send you the 3.8.24 installer.

Mike