After a couple of restarts and some changes of guide parameters the binning issue is back. Even creating a totally new profile with new optical trains does not help to cure the guide binning issue. It seems that recent changes in the handling of UI parameters are provoking such issues (see also here ). Even if a new profile can help, it is not always a practical way. Especially if there are a lot of user settings you do not want to loose!

From the developer I didn't receive much attention (they have other problems). So I'm asking the community if there are users with similar problems.

A very strange occurrence is shown in the following video, where I create a profile from scratch and guide binning is consequently set back to 1x1: