http://ciisqbg45nggykdl6rjdrq3wc64csga4vkphu66qsi65mypeitqedoad.onion/blog/ssh-tunnels
Actually, 0.68 has several security vulnerabilities, so you should just upgrade to the latest version. Start up PuTTY and you'll see the main screen: Under "Host Name (or IP address)", type in any of the host names from this list (they're the same as the VPN host names). If needed, you can change the port to anything from 1 to 29999 (excluding 5061 and 5062 and 5063).