They scammed me. They were always very solicitous, after I paid 200 dollars for the STOP DJVU decryptor they sent me a decryptor that didn't work. Then I was told that I needed to pay another $200 for them to provide me with a key that would work. I paid again and then they blocked me on Instagram and no longer respond to my email. Thieves! They are worse than hackers, as they are stealing from who has been previously hacked. Run away from these guys.