Go here & follow the instructions.
Razer Surround Pro will be available for 19.99 USD / 14.99 EUR, while the basic version will still be available for free. Any downloads before June 30 will automatically be upgraded to Razer Surround Pro.
Want to learn more about how Razer Surround works? watch the video below:
Want more free Razer gaming software?
Check out Razer Comms & Razer Game Booster