It seems to me that the current settings implementation does not use the standard MacOS UI for settings.

Pressing CMD-, should open application settings, this opens a empty window instead.

This should be an easy fix -- at least in my ObjC days it was pretty simple to add a standard settings window. I might try to get this going, no promises, though -- I've not be doing MaxOS UI development for a very long time. I'll see how this goes.