Any edits you make to a recipe will automatically be saved in your draft folder until you render a video. This means you are now able to start a project and go back to it at any time, as many times as you need, and you will not lose your work.
When you are happy with how your video looks, simply click the Export Video button on the top left of the customisation panel. This will then take you to the My Videos page where you can see all your videos as well as the details of what was used. from here you can go back and make any edits that are needed.