How to use Avast SecureLine VPN on Mac OSX

I got a popup offering me a 7-day free trial of SecureLine VPN on my MacBook running OSX 10.10.3. I installed it, and I see it in System Preferences Network. However, if I go to a website which displays my IP, I still see my IP. How do I use SecureLine VPN to preserve my privacy on Mac OSX? I’m running free Avast which seems to be the only option available for Mac OSX. I have a premier license on my Windows laptop, but I no longer use that.

Your can’t hide your IP, it will always be visible.
Secureline encrypts the data your browsers sends.

https://www.avast.com/faq.php?article=AVKB192#artTitle

You will always have an IP address “visible”, but when connected using SecureLine
it should definitely be a different address, than when not using the VPN.

You have to open the SecureLine application (window) and click on the “Connect” button.