Blender 2.79b Question

Hello,

I am using Blender 2.79b in Windows to try to create a Sims 4 pose pack.   I have done this many times in the past.  For some reason, when I open up a rig in Blender 2.79b today and then right-click on a random joint on the rig, only a random face bone ends up getting selected.  When I right click again, a different facial bone lights up, but not the joint that I'm actually selecting.  Additionally, the entire list of joints that usually appears over to the left will not appear.  I don't understand why this is suddenly happening and why I have never encountered this before.  I even tried deleting my old rigs and exporting new ones from Sims 4 Studio but the same problem still occurred.  Any thoughts or guidance would be greatly appreciated!  Thank you so much!

PrincessImp