You can ignore licence key notification for all premium plugins comes with the theme. We will include latest version of all plugin and release an update whenever new plugin update available. If you want to add license you need to visual composer, you need buy visual composer (or any other premium plugin) separately.
check below this, it goes all premium plugins.
https://wpbakery.atlassian.net/wiki/pages/viewpage.action?pageId=524337
