Plus Sign [add new text file] in binder not working

That’s pretty much it. The Plus [+] at the botton of the Binder is no longer working. I can only add a new text file through the gear or contextual menu items.

Is this a bug or has the usage of this + sign changed?

You can also add files with Cmd-N, and Project/New Text, but that is an aside.

I can’t off of the top of my head think of anything that disables this button. Is it actually disabled (light grey) or is it just not doing anything when you click on it (and maybe beeping)? There is one condition I can think of where it will beep: if you are viewing something in the Trash; but then the other buttons shouldn’t work either. Any console messages?