For silent upgrades: On the Windows endpoint, run:
msiexec /fa <path\cbsetup.msi> /qn
Important: using the /fa switch will result in a new Sensor ID being generated for the endpoint. This may cause the endpoint to appear more than once in the EDR web interface. In normal working environments the older Sensor record will be automatically removed after a certain amount of time.
The /qn switch will provide a silent install.
The /fa switch is for 'repair administratively' which will overwrite an existing installation and allow you to upgrade your sensors without failing.