Avanti is a free Minecraft editing program. However, if you want to get some really great advanced features, there is a beefed-up version called Avanti Plus. This costs $ 8.95 and is worth every penny!

How to do it–

download the free version of Avanti      http://avanti.xyz/download/

go to this page and buy Avanti Plus,  using Paypal         http://avanti.xyz/avanti/

They will send you an e-mail with a special code in it

Open your free Avanti and go to the tab marked “Options”. This will give you a place to enter your code and then download the new, improved Avanti Plus.