I am completely new to WordPress and followed advice in Digging into WordPress, also found at http://www.optiniche.com/blog/145/wordpress-tutorial-install-wordpress-in-a-different-directory
to install WordPress in a different directory. It worked fine. I gave an associate Administrator rights, and in trying to achieve something else, he went into Settings and changed the WordPress address (URL) from http://mydomain.com/directory back to http://mydomain.com
All formatting was lost. And now I can't seem to log in to change it back. Any suggestions would be greatly appreciated.