To install the plugin follow these steps :
- Download the wp-form-encryption.zip file to your local machine.
- Unzip the file
- Upload "wp-form-encryption" folder to the "/wp-content/plugins/" directory
- Activate the plugin through the 'Plugins' menu in WordPress
- Then go to Settings => General
- Then put the Comma Separated Form IDs under the section "Form to Encrypt (Comma Separated Form IDs)"