How to update?
To use automatic updates you need the Envato Market plugin. You can do that now via WordPress Admin › Appearance › Install Plugins or WordPress Admin › Plugins › Install Plugins panel.
After installing, go to the WordPress Admin › Envato Market and enter your token. If you don't have it, you can generate new one by clicking the generate a personal token link in the Global OAuth Personal Token section.
If, for some reasons, you can't use automatic updates, you can always use default way to update the plugin. When new update will be released, the CodeCanyon will notify you about that so you can download new package and install it manually, via WP admin panel › Plugins › Add new.