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Kate-2 Transmitter (Mx150)
Firmware Version 5.9 Released: Aug 29, 2021 Download this firmware and save it to your local hard drive. Depending on your browser you may have to right click and select "save as..." 
Use the Flight Data Analyzer software to update your transmitter. Simply click 'Tools' on the Flight Data Analyzer menu bar and then select 'Update Firmware'.
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New features included in this release:
1. Added the ability to manually abort (i.e. prevent) sustainer motor firing. It is now possible to send a command from the ground that will lockout sustainer motor firing.
2. Added the ability to remove the tilt constraints for sustainer motor firing. This can be necessary if the rocket will be spinning at a high rate of speed for an extended period of time. In which case, manual abort may be a better option.
3. Refined the GPS apogee detection process so that it now confirms apogee has occurred with a second GPS reading before firing the apogee deployment charges.
4. The transmitter will now rebroadcast the maximum GPS altitude periodically during descent. Therefore, if the downlink was not working during apogee the user still gets solid confirmation as to the highest GPS reading that occurred at apogee. This is only critical if the rocket is unrecoverable or comes in ballistic because normally all the flight data can be downloaded from the transmitter post flight.
5. Changed the SSR (solid state relay) and AUX (auxiliary deployment) pyro channels so that they default to "DO NOT USE" mode instead of defaulting to "USE". This was done since these channels are rarely used and avoids having the user need to disable them every time.
2. Added the ability to remove the tilt constraints for sustainer motor firing. This can be necessary if the rocket will be spinning at a high rate of speed for an extended period of time. In which case, manual abort may be a better option.
3. Refined the GPS apogee detection process so that it now confirms apogee has occurred with a second GPS reading before firing the apogee deployment charges.
4. The transmitter will now rebroadcast the maximum GPS altitude periodically during descent. Therefore, if the downlink was not working during apogee the user still gets solid confirmation as to the highest GPS reading that occurred at apogee. This is only critical if the rocket is unrecoverable or comes in ballistic because normally all the flight data can be downloaded from the transmitter post flight.
5. Changed the SSR (solid state relay) and AUX (auxiliary deployment) pyro channels so that they default to "DO NOT USE" mode instead of defaulting to "USE". This was done since these channels are rarely used and avoids having the user need to disable them every time.
Previous version of transmitter firmware (v5.8)