Similar to the links below, we messed up the value in Tentacle.Deployment.ApplicationDirectory when provisioning boxes. Is there a way to update this value without either re-provisioning servers, or reinstalling octo?
You can change the Tentacle application directory by running Tentacle.exe configure --app "C:\Applications" from the Tentacle install directory and restarting the Tentacle service.
You may be able to use the script console (https://octopus.com/docs/administration/script-console) in Octopus to run & 'C:\Program Files\Octopus Deploy\Tentacle\Tentacle.exe' configure --app "C:\Applications" --console and then restart the boxes via your management console.