4K screen support
At least with Windows 10 version 1909 high resolutions are supported in a way that DeskCalc works without display errors.
The video shows a 4K monitor on the right side and a HD monitor on the left side. The display is correct on both devices, it is even possible to move DeskCalc from one monitor to the other without any problems.
On the 4K monitor the display is independent from the scaling, no matter if 100% or higher, as far as OK.