"You'll see this message when trying to browse the specified folder"
Actually, you do not need to be trying to browse to the folder at all. Font Xplorer can be minimized, doing absolutely nothing at all (or so it seems) while I am working in another program, and it will pop up with this message at random.
Which begs the question: what is Font Xplorer secretly doing when it is supposedly sitting idle? Does it periodically rescan to update the font/folders listing? And if so can you include an option to turn it off in the next version (which btw is overdue according to your previous post :P)
BTW...i think, but am not certain, that this only appears when the folder browser pane is showing