In Notepad++, I've lost the document-switcher offscreen (I think). How do I get it back?

Solution 1:

I just solved this myself by editing the configuration file.

http://docs.notepad-plus-plus.org/index.php/Editing_Configuration_Files

One of the FloatingWindow elements had a negative width plus a negative position value, and I presumed it was the culprit and made both positive.