Private Key for encrypted file.

I am not able to view my forms because the data is encrypted. I need to upload a private key file, but I don't know where to access the file from.  Please help!

The PRIVATE KEY is something that you downloaded when you enabled Form Encryption. Keep in mind that if you lost your Private Key, sadly, there's nothing much we can do. This is something that we mentioned on our guide for Encrypted-Forms-and-How-to-Use-Them 

(a snippet from that page)

What happens with submissions if we lose the private key?

If you have lost the private key, then there is not much that you can do - it means that your encrypted data is lost forever, there is no copy of the same on our servers and it is not possible to crack the one that you had.

The only recommendation is to turn off encryption right away on each form so that you can start receiving the submissions - which you will be able to see (as the encryption is turned off), while you can leave the encrypted submissions in your Submissions Panel in case you find the key at some later point in time.

To give you an idea how to decrypt your submission data, both from your Submissions page and from Email, refer to the following clips:

1. Via Submission page:

2. Via email notification:

If you need more info, just click the link I gave above.