hi XabiTranche, you don’t need to insert license key for Visual Composer.
we have buy it as developer license, so our client is free to use it.
also please only use visual composer version that come with the themes. update the visual composer outside of the themes version may cause your website break.
hi angelcatanzariti1, i will not suggest you to update the plugin your self. it may break your website because incompatibility of plugin version. please only update the themes when we release new themes for prevent any compatibility issues.