I think I have finally fixed the problem, so please try this release:
https://www.high-logic.com/tmp/maintype/MainTypeSetup-x6413.0.0.1362.exe
Let me know if you see any strange things.
Right now the only thing I am aware of is, when you click a glyph in the Character Grid, it will show not instantly select the cell, but will only select and show it when you move the mouse while you keep the mouse down. Not sure if it is worth the trouble to fix it.
I am very curious if is is stable and if performance is good.