You can view all your contests by going to Contests in the Wordpress left admin menu. Here you can do a variety of things.
Create a new contest – You can add a new contest by clicking this button
Edit – You can edit your contests by clicking this.
Copy – By clicking copy you can duplicate a contest you have to re-use as you choose. This is perfect for running multiple contests that use the same designs, templates, settings, etc.
Delete – Click trash will delete this contest and place it in the Wordpress trash.