Yesterday I hit Software Update to see if there was a newer version of 16.1. A window popped up showing me v17.
On another computer that's running 16.1, when I started VMWare, a window popped up asking if I wanted to update to 16.2.5. I went back to my production machine and hit Software Update again and was again showed the v17 window but this time when I closed the window another popup showed up offering me 16.2.5.
After updating from 16.1 to 16.2.5, the problem of not being able to open my 11.x virtual disappeared!!. My compiled program in XP now works in WS 16 PRO.