I was doing some housecleaning on my laptop and was not careful enough, so I must have deleted some parts of both GPO4 and Aria.
All is still working fine after going through 15 "can't find log files", "Can not find ambience and effect). After I OK all of these, everything starts fine.
I would like to re-install everything but afraid to uninstall without some good advise. I still have the Garritan .plg file, if that helps.
Thanks, sorry for my stupidity...