Program already works very well when the HighDPI Override is activated in Win 10 (exe File Right-Click->Properties->Compatibility Tab and check the checkbox "Override high DPI Scaling behavoir" and set to Application).
I'm running a 3840x2160 px TFT and 140% font scaling:
Blurry original:
HighDPI Override:
Only some Dialogs would need some minor reworking, depending on language/string length etc.:
Anyway, thanks for the great app.