Beachball O' Death at Acrobat launch

Hi all!  A lady in my organization is having trouble with DC.  While logged into Creative Cloud, when she launches the program on her iMac running Yosemite, it immediately beachballs.  When it's started without her credentials, it acts normal up to the point it requires sign in.  During one rinse/repeat session, I was able to quickly set the Recent list to 0, thinking perhaps the path to a now deleted or missing .pdf might be causing the problem; no dice.  The program has been uninstalled/reinstalled with the same unfortunate result.  Any clues, insights, shared experiences would be of great help.  Thanks in advance!