I gave this a go (v1.0.10b) and started having scaling issues as soon as I pressed that fonts button. After trying scaling options with the Win 10 DPI settings within program "properties", and going back and forth several times, I've finally got it to open correctly. I've chose "scaling chosen by "application"". That makes things a little bit larger and easier for my old eyes to see. If the large font button within DeltaWave worked correctly, I'd use it, but I dare not touch it unless/until it works correctly on Win 10. BTW, my system scaling is set to the recommended (according to windows) 150%. 1920x1080 panel, not sure what font size.