How to encrypt my existing form?

You can encrypt a form in the Preferences wizard. Here's a guide:

1. In your Form Builder, click Preferences button.

2. In the Preferences wizard, click the Advanced tab then change the Encrypt Form Data to Yes. Click Save changes when you're done.

Related guide: Introducing-Encrypted-Forms-The-Ultimate-in-Online-Form-Security

Hope that helps. Thank you!