1. Install the FSLabs Control Center by running FSLControlCenter_2.0.1.197.exe. The installer itself is completely unmodified; it is included here in case the crack is not compatible with newer versions of the Control Center.
2. Navigate to your FSLabs Control Center installation directory (the default one is C:\FlightSimLabs\ControlCenter) and replace "FSLControlCenter.dll" with the patched one included in the download.
3. Open FSLabs Control Center and install any aircraft. When the activation prompt opens, simply click "validate".
4. Done! You can now install any aircraft as if you had purchased it normally.
Notes: Avoid updating the Control Center, as future updates may break the crack. However, updating installed aircraft is completely safe. Note that the Control Center must remain running for the aircraft to work; you can keep it in the background by enabling "Minimise to System Tray" under "User Options" in the FSLabs Control Center's settings.