Hello,

You need to update Visual Composer too. But you do not need a licence key to do that. Te latest VC version is already included in the last theme update package. You only need to follow these steps:
1-Go to Plugins and deactivate current Visual Composer;
2-Delete it with all the files. If you have made changes to them and want to keep a backup then go to your wp-content/plugins folder in the server. Use a ftp connection. Rename the current “js_composer” folder.
3-Go back to wordpress dashboard; You will see the message requiring you to install required plugins and the WP Bakery plugin is one of them.
4-Follow the onscreen instructions and install plugin once again, like you did the first time.

Read this article .

-Visual Composer like all the included plugins, has an extended license.
This means they can be used by any one purchasing our theme as long as they use the version included in theme folder. You do not need to buy it yourself in order to use it. But you do need to keep the included version. You can not update it on your own terms with this type of licence. If you must update before we do, then you’ll need to buy your own copy.
The rules of the marketplace don’t allow us to give the plugin activation code. You can use the existing version without any problem. We update frequently all theme plugins to their latest versions in every theme release or in case when an urgent update is needed. So they are always fully compatible with the current theme version.
Just make sure to always have the latest version of theme and it’s included plugins.

If you want to buy a license by yourself this is allowed, but we thought that this isn’t needed because the version included works perfectly.
You are free to make the choice that best fits your needs.

Best regards!