If Intellect as a Service was started manually after its installation (see Enabling Intellect as a Service startup), do the following to update it:
If Intellect was initially installed as a Service (i.e. the Install Intellect as a service checkbox was set when installing Intellect), you don’t need to change the registry key, you can go straight to updating according to the manual.
As a result, Intellect will be updated and continue to operate as a Service.