As with most Mac software, Tunnelblick lacks a “clean and easy” uninstall process.
To simplify the process, I’ve outlined the six recommended steps, below –
1. Drag the Tunnelblick program from your Applications folder to your Trash.
2. Click your hard disk icon on your desktop (or open your Finder).
3. Click on Library->Application Support, and Delete/Trash the “Tunnelblick” folder if it exists.
4. Click on Library->Preferences, and Delete/Trash the “com.tunnelblick.Tunnelblick.plist” file if it exists.
5. Empty your Trash.
6. Restart your computer.
For more information on Tunnelblick configuration and install/uninstall processes visit: http://code.google.com/p/tunnelblick/wiki/UsingTunnelblick