Encryption key problems

I am using chrome browser for my primary.  I saved  an encryption key on my computer.  There were only 2 save options.  one as keynote and the other as all formats.  Can you please advise what application these should be opened with.  I tried PDF and it wouldn't open.  I tried notepad and got a -----BEGIN RSA PRIVATE KEY----- and -----END RSA PRIVATE KEY-----  Is everything in between the encrypt key?  There's a lot of text and I'm not clear on if that is what encrypt keys consist of.

Next then, I created other keys.  Is there a way to delete the others and only use this one that I have?  Is there a limit to the number of keys that an account can have?

Sure, I'd be more than happy to help you with the question and problem about the encryption keys.

Those encryption keys belong to encrypted forms submissions and are intended to allow you to use them to securely view the encrypted data.

Also, it is not recommended to try to edit the keys such as opening it in notepad to look at it or try to change it and such since that can break it's secured functionality including renaming it.

Please see https://www.jotform.com/help/344-Encrypted-Forms-and-How-to-Use-Them for more details about it.