A plugin that can be used to tap into an eduTrac install's RESTful API for authentication into a WordPress powered site.
You can visit the eduTrac community site for instructions on retrieving an authentication token.
Since you are authenticating against eduTrac's RESTful API, make sure the super administrator username in your eduTrac install, matches the administrator username in WordPress. Once it's in there, you'll be able to log in as the administrator. If you are unable to log in, delete the plugin and access should be restored back to the WordPress administrator.
No, this is disabled. The only way to create accounts is through your eduTrac installation.
No, what ever information is entered on the WordPress profile page will be overwritten or destroyed on the next login. It is best to redirect the user back to eduTrac.
FTP into your server, navigate to the plugins folder and rename the plugin; if it's a database connection related error.