Are you saying you put it in a folder that also contains characters that you CAN open, and it still did not show up in the library? That cannot be! Did you change library catagories and change back to refresh the display? If so, I would try try temporarily removing one of the file sets for a character that you can open to see if it disappears from the library display. Do this to confirm the libray file you are moving things around in is actually the one Poser is using. Sounds like you could have two duplicate versions installed??