The first thing I did with my new 13.1 installation was to change the default FM from Dolphin to Konqueror from the Default Applications of System Settings.
A few minutes ago, I needed to test a web site, so, I opened a new Konqueror window and switched to a web browser profile. After that, I cannot open Konqueror as the default FM. I switched even to Gwenview, but, still, the File Manager menu entry opens Dolphin.
Then, I tried to “pin” konqueror in FM profile, as I used to have until a few minutes ago. I failed.
So, I need to somehow reset everything and try again. How?
OK - normally using Konqueror as a browser involves invoking konqbrowser. Has the temporary use of Konqueror as a web browser without invoking it using konqbrowser caused a settings conflict? I know it shouldn’t but I always remove Firefox because it causes a similar conflict.
Try setting Konqueror as Default File Manager and konqbrowser as Default Web Browser and see if that solves the problem.