Hello,
WPBakery Page Builder and Revolution slider come bundled with our theme but they can’t be activated with our purchase code. Actually, you don’t need to do this. Only in case you want to get free premium support from its author, you can purchase it from Codecanyon. But it is not necessary since we will always provide you with the latest updates.
You can update the plugin in Appearance > Install plugins. If you have any problems (these problems are often caused by the host security or size max size limitations) you can upload the plugin from your profile from this forum and install via Dashboard > Plugins or FTP.
1. Make the full backup of your site.
2. Deactivate and delete the current plugin version.
4. Upload and install the plugin in Dashboard > Plugins.
If you need help, feel free to contact.
Best Regards