How do I use my encryption key

Seems like you opened a similar question yesterday about it, I have also replied to you on the other thread you've opened, here is the link: https://www.jotform.com/answers/979814 

I have also checked your email address and found it is in our bounce list, this is why you did not receive the reply via email; however, I have removed so you will receive emails from JotForm now, please also check my reply on the other thread and let us know if you have any question.