The scaling might be an issue for Start10 itself, but unfortunately, I need that scaling on a high-resolution screen as otherwise everything too small for me to work with. I've been using my 4K screen for more than a year and no other application had the issue with the current display settings.
However, looking at the png behaviour on my taskbar, it should really always set to the height of the first row of the taskbar or its width along with the logic of whichever is smaller to support users with vertical and horizontal taskbar setup. Also, this is something to think about as more and more 11 and 13inch laptops are released with at least 4k screens which means the scaling will be set to similar levels as mine on those small displays.
Thanks and looking forward to your solution.