Update:  An identical library fault error happened again today and I was unable to go back far enough in system restore to correct it, so I submitted the problem to Smith Micro support.  While waiting for an answer I browsed through 'answers' and found a similar problem for the Poser 8 library.  The recommendation was to update to the latesst Flash for IE, even if you don't use that browser.  Well, I use Pro2010 and Firefox (don't care for IE) but figured it was worth a shot.  For whatever reason, this worked and the library opened as soon as I opened Poser.   I don't know if this will help anyone experiencing a similar problem, but it's definitely worth a try.