Today Design 7.1 prompted me to install a new update. I did, and now none of my project files have any of the drawings that they should, there are no drawings in the drawing tabs. How can I restore my files to the way they were before this update?

I, too, have now lost critical drawings for a very large client.  Not happy.

UPDATE: Not sure why/how, but things appear back to 'normal'.  Closed/reopened SD several times, edited copied files that had been edited last week (file timestamps unchanged).  A bit nervous but working....