How to decrypt submissions?

I accidentally encrypted a form and I did not the correct key to access the unencrypted information. Can you help me set a new key or uncrypt to responses? I have updated the setting but have 6 responses I need to access. 

You may try to check for your private key in your browser's download folder.

However if you have created a new private key, you cannot use that key to decrypt the old submissions.

I would suggest you let the user fill the form again, as it is not possible to decrypt submissions using another key.

For more information ,you may check this guide:-Encrypted-Forms-and-How-to-Use-Them

Hope this information helps.