Page builders like Visual Composer and sliders are most used commercial plugins in WordPress themes. The plugins are included in your download package and we have purchased an extended license from the plugin author to do that. The permission from plugin author is only for using the plugin by customers not auto updating or getting support from plugin developers.
Updates for these commercial plugins are only available through our releases. So if there is a new version of a specific commercial plugin that has been bundled in of our theme is available you need to wait for next release of your theme. We will regulary check those plugins and always include latest version in our theme packages.
Other than that if you need immediate update option or support from plugin developer you should purchase separate license from plugin author in CodeCanyon.
Visual Composer plugin link:
MasterSlider WordPress version:
MasterSlider jQuery version: