Did not found any video on YT or manuals on CE wiki how to flash fw particulary on AM9. If you know such tutorial paste the link.
I tried USB Burn Tool 3.3.4. Can’t make it to detect my device. I tried many combinations with using Recovery hole, booting into Android Recovery (here it is “Return to previous firmware” but it says “Firmware not found" and no way to select img file on SD inserted) booting into bootloader, entering to fastboot mode… in all of this modes box is not detected in USB Burn Tool 3.3.4. During the startup I see DNL device in Device Manager on Windows 11 but it is for only 1-2 seconds visible.
I’m lost. Can’t revert from 2.0.4 to 1.2.0 firmware.
[Update] Got it! USB Burn Tool 3.3.4 inside 7z with 1.2.0 firmware is not an setup file but it is already content of this app and of course when launched it works but apparently drivers are missing. USB Burn Tool 3.3.3 inside 7z with 2.0.4 firmware contain V3_setup_V3.3.3.exe which need to be installed and it install drivers as well. Then I was able to flash 1.2.0 firmware.