Starting from the Episode overview of your Project, make sure you are in the 'Deleted' section on the left. Then click the three vertical dots next to the Episode you want to restore. Next, select 'Restore' from the menu.

Cuez will ask you to confirm this action, so use the blue button to confirm and proceed.

Once a deleted Episode is restored, it moves to the 'Episodes' section on the left.

The Episode can be used again.