1. Make sure you are a superuser or admin
  2. Go to an existing 2sxc app module on a page, or add one and select an app (it's important that you select an app, otherwise the admin-app won't know which app to admin)
  3. Hover over the module. In the rotating navigation, click the more ellipsis a few times, till you see the icon with one gear. You will then see the content administration.
    imageapp administration