Download and fly.

Hermes 2 is the interface. Run the installer, sign in once, and it opens on your CJ4.

1

Download rird-setup.cmd

2

Run it — email and password, that's all

3

Hermes 2 opens with the CJ4 ready in Microsoft Flight Simulator

Windows 10/11 · needs Microsoft Flight Simulator installed. The installer sets up Hermes 2, pulls your licence and sets the aircraft to CJ4. The key stays on your machine.