F.A.Q.
Tunnelblick for Mac OS X
Download the latest stable version of Tunnelblick HERE and install it.
Download the configuration files of the servers you want to use HERE
Click on a .ovpn files that you downloaded to open it in Tunnelblick.
Click the Tunnelblick icon to choose the server you want to connect to.
Insert your credentials and click OK. You can view your credentials for the VPN in the Customer Area > Services. Note that credentials are case sensitive.
You are connected.