Yes, no joke: People are really asking this question. I actually thought it would be obvious and easy, but I was wrong :)

So here it is, the instructions on how to order something on Filmmusic.io.

• First create an account or login, if you forgot your password use the "Forgot password" feature.
• On any song there is a "Add to cart" button - click on it.
• The extended license is now in your cart.
• If you want to buy more licenses for other songs, repeat this procedure.
• When you have all the licenses you want in your shopping cart, click on "Cart" button in the upper right corner.
• Follow the instructions and do the order.