How can I block certain urls when using Avast Internet Security?

So, I downloaded the trial for Avast Internet Security (I was using the free edition) and I wanted to configure ut to block a bunch of really anoying pages full of advertisement and such…

The thing is, with the free edition, I had an option within the “Additional Protection” menu where I could list the urls I wanted to block, but with this edition that sub-menu seems lost…

Anyone can give me a tiny orientation as to what should I do?