TREE VIEW Invisible / Gone

I am having the issue that others have had with Tree View disappearing. It seems to "be there", in that when you choose "explode view" is acts like there are entries extending past the end of the window and puts up a Scroll Bar. When you compact the view, it removes it - just like it would because the list of folders is smaller than the window. (see screen shot)

I've tried all the suggestions from similar posts, nothing has worked.

I recently got the auto-notice to update to the 'next' version and declined, am still on 2.0.3.0

Much appreciated for any help that you can offer ...