The Transform Panel is no longer available.

I've been using Lightroom for ~5 years.  4 days ago the Transform panel in the Develop section stopped showing.  I have right clicked on the other panels and the list that appears has all of the other panels, except for Transform.  I have clicked on the "Windows" drop down on the top bar, and then "Panels" and again all of the other panels appear in the list, but not Transform.  I just got off a half hour session wiht Tech Support and they were unable to figure out what was going on, and suggested I post here.  PLEASE HELP!!!  Thanks!