I've only 25 or 30 imps where Librarian can find them and just two categories. I tried moving the files to a location it can't find without success.
I did wonder if it's arguing with my router for an IP address. That and imp files are labeled as being registered to Softbook publisher rather than eBookwise librarian. Double clicking a file opens the eBookwise librarian correctly so I'm not sure what's up with that.
It's probably doing some sort of house keeping since it slows the PC to a crawl but I have not figured out what it's doing.