I found this post from J5 in a thread that might not be viewable, so I'll quote it here:
Originally Posted by Johnny5
Something similar came up a few months ago in a site support thread. I didn't realize it wasn't publicly viewable at the time, so I should post this here:
The Chip Factory stores user data on your computer as a Local Shared Object (Flash Cookie). It seems that Flash version 10.3+ started integrating with web browser's "clear history" functions. Previously there was no way to clear the flash cookies from within the browser, but now it seems that clearing your HTML cookies can/will now also remove your flash cookies.
If you want to look for (or back up) your Chip Factory saved data, the LSOs should be stored here (on a Windows PC):