Read the OC4BAv4 documentation from the Home page of http://www.flightsim4fun.com
If you already have OC4BAv2 or OC4BAv3, you can upgrade to OC4BAv4 for just 10 USD.
FC4BA Fault Controller is included for free.
Send email to roarkrsp@gmail.com, with subject field "UPGRADE to OC4BAv4"