As some of our themes comes included WP Bakery Page Builder(Formerly Visual Composer) and we update this plugin along with the themes. If you don’t have your personal license for the plugin then you would be updating it once an update of theme is released with new version of WPBakery Page Builder plugin. To start updating this plugin you must deactivate it first from your WP Dashboard => Plugins => Installed Plugins page.
Once deactivated, move to your WP Dashboard => Appearance => Install Plugins page and update the plugin from there.
Now once updated, you can activate it again from either Plugins => Installed Plugins page or from Appearance => Install Plugins page.
Hope this helps.