There is much discussion and lots of posts on how to accomplish this, but this is what works:
SSH into the remote host, then enter:
- sudo '/Applications/Timbuktu Pro/Timbuktu Pro.app/Contents/SharedSupport/TimbuktuInstaller' '/Applications/Timbuktu Pro/Timbuktu Pro.app'
You'll see the Timbuktu host killed and restarted, allowing you to connect via Timbuktu again.
bilbo:~ gtadmin$ sudo '/Applications/Timbuktu Pro/Timbuktu Pro.app/Contents/SharedSupport/TimbuktuInstaller' '/Applications/Timbuktu Pro/Timbuktu Pro.app'
Password:
Replacing existing host.
Killed Timbuktu Host Menu (pid=1967).
Waiting for host to come up.
Host came up.
Installing StartupItem or SystemLoginItem.
Installer exiting.
Cudos to thread on MacWorld.com and msilverman for the solution.