Version Sets not available in PSElements 19

[#1]

Using Photoshop Elements 19.  A new problem just started:  I select a photo in the Organizer, then right click and select "Edit with Photoshop Elements Editor ...".  I then make some edits in the Expert area.  When I select "File > Save As", the choice "Save in Version Set with Original" is greyed out and not available to be selected.  This choice has always been available until today.  How do I restore the availability of "Save in Version Set with Original"?

[#2]

Using Photoshop Elements 19.  A new problem just started:  I select a photo in the Organizer, then right click and select "Edit with Photoshop Elements Editor ...".  I then make some edits in the Expert area.  When I select "File > Save As", the choice "Save in Version Set with Original" is greyed out and not available to be selected.  This choice has always been available until today.  How do I restore the availability of "Save in Version Set with Original"?

[#3]

What OS are you using?  Please post a screenshot of the Save As dialog.

[#4]

I'm using Windows 7 Professional, Service Pack 1 on a Dell Latitude E6540 laptop.

[#5]

The problem seems to be limited to one particular folder in my filing system.  I just made some test edits of photos in other folders and have been able to save the edited versions into version sets.  This is bizarre.

[#6]

Your screenshot looks like you are saving to the original file name. What happens if you change the name?  Alternatively, what happens if you check the box for Save as a copy?