The code of Business Icons Vol. 2 is licensed under the GPL, so anyone may use, change and share it. Mercado GPL is a paid service: a plan or a purchase of Business Icons Vol. 2 gives you the download and its updates. The developer's own support, licence key and online services are not included.
How do I update Business Icons Vol. 2?
Install MercadoGPL Updater on your site and paste your key from My Account. It installs new versions of Business Icons Vol. 2 for you.