Go to Theme Options > Header builder > edit the header and remove the cart widget from the connection block http://prntscr.com/rzacu7
If you don’t need products then just remove all the elements editing the page content that display product or you can also disable WooCommerce plugin if you don’t plan to create products in the nearest future. You’ll be able to enable it once you decide to start with creation.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.