Just thought I would report that with a 4K display on a 13 inch laptop, Windows 10 sets the scaling to 300% by default so programs are big enough to see and click buttons on. With Lady Heather v5 and v6beta, Scaling doesn't work well and all of the writing turns into a bit of a mess. I have tried all the different sizes and font sizes, they all look like this.
I have a multi screen setup, a 1920x1200 monitor and the laptop 4K display, and when Heather opens on the 4K display, this is the result, even if you move it to the HD screen. When it starts on the HD screen, it is ok.
I am happy to help test this if the developer wants to correct it. This isn't the only program that faces this issue, but i think as hardware evolves, more of us will have 4K displays.