Wow, this is getting very strange.  I renamed it, tried to open Designer, same experience.  It starts the box showing me the "about" information, then stops opening.  Then all of a sudden, there was another Designer folder.  So, I renamed that.  Then I tried opening Designer again.  It then created ...

Ah, yes!  But, I'm sorry, I should have asked you - what am I renaming the folder TO?  "AdobeDesigner" - or what name should I make it?

I do not have a Designer folder there?

It has worked fine for over a year, now when I try to open it either via the shortlink on my task bar, or via "Start", the box with LiveCycle details appears, then disappears, and nothing happens.  Have tried rebooting my PC (Windows 7) but that doesn't fix the issue.