Hello,
Header Builder > Cart > Mini-Cart Promo Message > edit Text tab content. Go to Multiple headers and edit the same for the custom header.
If this is not what you are looking for, describe your request in more detail with screenshots. You can use Lightshot screenshot or Gyazo tool to make screenshots and share links here.
Regards
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.