Thanks, very interesting!

Could you please try this version out?

I added a "bottom left offset" setting to Options, it will shrink the map by the specified amount of pixels. Try setting it to 100 and verify that the (reduced) map appears fine when the window is maximized. If it does, please try finding the lowest "bottom left offset" value that still allows the map to display correctly when maximized.

Note that this setting is not kept in the registry and has to be made every time after starting the program.