It wasn't just defaced. Elias logged into the FTP. The wp-content folder was empty. The database tables had been dropped. There was nothing left but a single index.php file containing a taunt.
You're looking for information on Autoptimize Pro, specifically regarding a "nulled" version and its exclusivity. I'll provide a comprehensive overview while emphasizing the importance of using legitimate software.
If you're hesitant to use a nulled plugin, consider the following alternatives: