Step 1: Log into your cPanel
Step 2: Locate the Software/Services category and click on the Softaculous icon.
Step 3: Look to the upper right corner end click on the All Installations or Application Installs icon.
Step 4: You will see a list of currently installed applications. Find the one you want to enable the Auto Upgrade for and click on the Edit Details icon. It looks like a piece of paper with a pencil on it.
Step 5: This brings you to a screen that has several settings you can change for the installation. One of them is the Auto Upgrade checkbox. Check this to enable it.
Step 6: After enabling the feature, click on the Edit Installation Details button. The feature will now be enabled.