So you go through APD's checkout process to get a discount code and then ...
"Click here to add the product to your cart: https://waldorfmusic.com/en/waldorf-edition-2-software/product/35-waldorf-editionle
Next, click "Proceed to Checkout" and either register for an account or login to your Waldorf account if you already had one
Next, proceed to cart page, where you can use your discount code from above to reduce your cart total to $0. Then complete the checkout process.
After this, you should receive an email from Waldorf with your download links and further instructions"
A somewhat convoluted process.