I had some trouble finding details of how to remove VyprVPN from my Mac with OSX Mavericks 10.9.3 installed.
After contacting GoldenFrog Support this is the information that they gave me:
Then, quit the vyprvpnservice listed in Activity Monitor.
If you have trouble quitting the process, open Terminal on your Mac, and type the following:
sudo launchctl unload /Library/PrivilegedHelperTools/vyprvpnservice
Press return, and you’ll be prompted for your password, which should be your login password (you won’t see characters while typing the password).
If you too are having problems finding this information then I hope this helps.