I'm not sure if "tab" is the right term or not. But I'm talking about the tabs (Features, Sketch, Surfaces, etc) that bring up the different sets of icons in the upper left. The Simulation tab has gone AWOL and I can't get it back. The simulation add-in is definitely running. I've tried restarting SW, restarting the computer, launching SW in software openGL mode, launching SW while bypassing the Tools/Options settings, and spinning my chair around 3 times in a clockwise direction. I am running 2019 sp5.

The picture below shows what happens when I right-click on a tab. Simulation should be on the list but isn't. Any suggestions?