Windows 7 HL8548 drivers

Hi!
I have to downgrade the firmware of my 3G modem from RHL85xx.5.5.26.0.201912270948.x6250_5 to RHL85xx.5.5.24.2.201710111800.x6250_2. (with the last fw, download using the AirPrime, the modem dead)

I have a MangoOh red board and I trying to use the USB port as indicated bellow:

My Windows 7 is not identifying the board:

Someone knows where I can download the windows drivers?

or…

it is possible to perform the update using the console port?


ping back windows-7-usb-driver-for-hl8548-g

how about this one?

https://source.sierrawireless.com/resources/airprime/software/hl854x-usb-drivers/#sthash.N8bZyOPY.dpbs

many thanks.

Now I have to discover how to update the firmware on my HL8548.