Thanks! I found the folders that contain the files to be deleted. My elibrary is running again.
C:\Documents and Settings\All Users\Application Data\kinoma
C:\Documents and Settings\All Users\Application Data\Marlin
C:\Documents and Settings\%username%( i.e. you windows log in name)
\Local Settings\Application Data\kinoma
C:\Documents and Settings\your user name\Local Settings\Application
C:\Program Files\Sony\eBook Library