If a Pro3 has eCommerce turned on, select the Cart icon on the track level and then chose the license > add to the cart
When ready, select either Add to Cart & Checkout or Proceed to Checkout once you are done chosing your tracks.
From here, users can either chose to heckout as Guest or Login
Users will then need to add in their Production Information and then Continue to Payment. Once here the user can checkout using Credit Card or PayPal
Once the purchase is complete, the user can download the tracks and will recieve their invoice