If wp-config.php is moved outside main wp folder, like the one above, plugin just blinks when told to scan - and error.log hints it cant find wp-config.php.
PHP Fatal error: require_once() [<a href='function.require'>function.require</a>]: Failed opening required '../../../wp-config.php' (include_path='.:/opt/php53/lib/php
Moving it back in WP folder make everything work.
in pgc-ajax.php is under suspicion.
High risk plugin, love it :)