Step #1: Click on the FAD dashboard > Settings 

You can update the status of the app to “Enable” or “Disable”.

• Enable: App will be enabled on your store, this will affect checkout for all customers.
• Disable: Disable this app without deleting any discounts. A deactivated app will not affect checkout for your customers.

If you want to disable the app from your store, then make sure you disable the app from the theme customize as well.

Go to Customize and disable it.