Big Thanks for the advice! I already suspected this so only two of my toons are screwed. Also, settings seem to change at random intervals even without player action. On one occasion, i've seen an option revert to default right before my eyes, e.g. while the Options window was open. And another piece of information: I'm…
Just in case you wonder, a complete reinstall including folder deletion, manual registry fixing and throwing a black cat over my right shoulder didn't do it either. TY BB. Next game please.