I just went from sandbox to live with my PayPal Express Checkout.
But when I try to use it, I get the following error:
You are not signed up to accept payment for digitally delivered goods.
My account is a business account and I have added express checkout as a payment option.
What other steps do I need to take, to get this function to work?
Answering my own question, which hopefully can help someone in the future:
I don't know what the exact problem was - the Express Checkout (Digital Goods) didn't show at my account, only the Express Checkout option was present.
I had to write PayPal, and they enabled it manually for me..
So if you're experiencing same issues, simply just write or call PayPal, and they will help you enable it.