Trouble with Excel 2013 PowerPivot or PowerView – add-ins are not available in Ribbon view?

Since I’m continually running the latest betas or versions of software and add-ins – every once in a while my system will get in a wonky state.  I was having the issue where PowerPivot and PowerView weren’t showing up in my Excel 2013 ribbon and noticed a couple of others were having the same issue…