What about the resolution? Is the text too big, too small? More information is always helpful.
I get no issues with 125% but I use a 16:9 1080. At 150% the font is smaller so will look at how I can make that auto adjust if possible.
In the mean time you can edit the xaml file and change anywhere the code shows FontSize="28" to either a smaller or larger font size based on what you need.