It's usually fixed by closing and reopening VBE (not the Excel, though that should fix it as well).
Other than that, do ALT+V, then T (while in VBE). And see if there's check beside "Standard". If not click on it.
Edit: Ah, didn't see the very right of your screen shot. Looks like it's checked... Then, I suspect, it's detached from menu bar, and floating. Try adjusting screen resolution etc and see if you can bring it into screen area.