I'm following the guidelines to integrate a form with Salesforce:
1. Edit the form you would like to integrate (choose from the Edit Forms page).
2. Click "Form Settings"
3. Click the "Advanced" tab
4. Check the box "Enable Salesforce integration"
5. Save the form
At the step 4, there is no tick box "Enable Salesforce integration". I'm using Gravity Forms version 18.104.22.168. Do I have to upgrade?