If you've modified your original template, or want to just add another, you just simply need to click the add template icon under the templates page. We'll automatically add a fresh copy the newest default template. 

Make sure you're on the Template Settings page and then hit the blue plus button. 

This will bring you to the settings for that template. Once you click the add template button, the template is created. Make the edits you want, and to close the setting options click close. No saving needed!