I have so much wrong with my puter at the moment, that I have to ask for help about this potentially very simple problem (my head is spinning).
In the Dopus lister, in some folders, when I click on the lister headings (Name, Ext, Modified and Size in my case), nothing happens. In other cases, it works as intended (ascending, descending and "natural"[?]).
where I unchecked "Keep folders sorted alphabetically".
When I "paniced", I did not notice that I checked in folders with only folders or folders and only one file, so I did not think anything could be sorted.
Now, I can sort again, since I saved as All Folders > Replace All.