Layer slider, Revolution slider and WP Bakery Page Builder (Visual Composer) are independent products, that are sold on Codecanyon by its author. When you purchase it, you get an item purchase code that can be used to activate automated plugin updates.
When you get Layer slider Revolution slider or WP Bakery Page Builder bundled with the theme, you don’t get item purchase code with it and you cannot activate automated updates using purchase code of your theme.
It doesn’t mean that you have to buy these plugins additionally to get updates for it. Layer slider, Revolution slider and other third-party plugins, that come bundled with Crumina themes, are free for the customers of Crumina themes and you can get all latest versions of them on Crumina community forum.
In order to update the plugin, download and unzip the archive and upload the plugin folder to ‘wp-content/plugins‘ directory replacing the old file.
Also, you can update third-party plugins directly from our updates server, when new theme version is out.