It disable default Post Editor and let users like Authors and Editors (not Admin) to write posts only using custom fields.
There is no admin panel (actually)
Use your FTP client and go to:
/wp-content/plugins/editoremover directory, open
editoremover.php and modify this line:
if ( ! current_user_can( 'install_plugins' ) ) with the appropriate role based on this page of the codex: