If you want to edit or delete a saved template then you have to follow the easy steps below:
After creating new campaign or landing page and completing the first steps, click on "saved templates"
Hover the saved template you want to edit or delete and you will see two icons on top right corner
If you want to delete "saved template" then click on icon "delete"
If you want to edit then click on the icon "edit" then edit your tempate with the drag & drop editor and save