Melanie: why not just copy your subdirectory onto a cd. Then if you have a problem just copy it back. I did that to back up my ever growing bunch of things. I got an updated (faster) computer and just copied the subdirectories from the libraries, geometries etc. to the new install. Worked for me! So now I back up the creations on a cd. When I need them just copy them on, delete them off when I don't need them any more.