Since the update I have been unable to switch to root while using PCmanFM - it used to work.
When I selected the option under tools I got message about a switch not being set, and then a box asking for info, which I didn't really understand but since it gave suggestions I though I'd try them. I put in "xterm -e %s" in one and something like "gkuf %s" in the other as in the suggestions. (Sorry I'm a bit vague, but I didn't make notes of the exact wording.)
Now I get the expected request for admin password, but when the window comes up it says "Permission denied".
I don't know how to go back and undo what I did - or how to get it working. I suppose I should have asked first!!
Can someone help please?