This instruction covers the installation of the FTDI USB driver
Airmaster controllers use a USB to RS232 conversion cable when communicating between the controller and a Windows PC. This cable uses a driver chip made by FTDI and requires a software driver.
Normally the windows environment (10/11) will automatically detect the cable when it is plugged in to the pc, and download the appropriate driver. However if this does not happen automatically, then the driver can be installed manually.