I think I just figured it out. I saw the button “framework upgrade”, which I do not recall seeing before. I did this and only now it seems to have switched to redux. I will test everything now but I think my problem might be solved.
I am not sure which Settings you mean in the admin top bar. I also tried Jevelin -> Customize Settings -> Backend Options and it tells me I am not eligible to access this page. (I have the Jevelin Theme, not Gillion). I do not see any “Jevelin Settings” in the admin bar.
After I reinstalled the current version of the theme, I also installed redux. I thougth it might have something to do with Unyson, since this is what I had before, but it seems like this theme is no longer availabe. It says “depricated” and when I click the link it says plugin not found.
This seems to be the underlying issue of my previous question. It would be great if it could be looked into.