I completed my 2016 return using TurboTax Home & Business for Mac, and now want torrent the return, but it will not open, not even from the recent file menu. Any ideas?

I've tried double-clicking the file, choosing the file from the list under Open Recent in the File menu and choosing Open Tax Return from the File menu and then navigating to the return and choosing it, but none of those methods will open the return in TurboTax. I only get a new Untitled return.