Hi guys.
This is totally fine, but please read over the guidelines here:
http://www.advancedcustomfields.com/resources/getting-started/including-lite-mode-in-a-plugin-theme/
Basically, you need to make sure the update script is removed from the plugin if you intend on selling / distributing it.
Whilst it is internal, you may keep the update script active.
Does this help?
