On the test, I will flash Rocket M5 with XM 5.6.5 firmware for version 6.1.8.
I will describe the update procedure:
1) Download the new firmware from the official site
https://www.ubnt.com/download/airmax-m/rocketm
2) Open the device web-interface by typing its IP-address in the browser (standard 192.168.1.20, standard login “ubnt”, password also “ubnt”).
3) In the web-based interface on the left, click “System”, opposite “Upload Firmware:” click “BROWSE” and select the previously downloaded firmware file, a window will appear in which click “Upload”, in the next message click “Upgrade” and wait until the upgrade is completed. Power at the time of the update can not be turned off, otherwise the firmware may be damaged and it will have to be restored.
How to recover I wrote in this article – Ubiquiti (UBNT) device recovery
See also – How to enable Compliance Test on UBNT devices
This completes the update procedure.
After updating the firmware settings are not reset.