Where to find RN2483 firmware updates

Hi,
I’m trying to update the firmware of the TTN Node for consumption problem (The Things Node Battery consumption)-
I’m not an experienced user, looking at this interesting thread I try the following steps:

  • Connect the TTN node to a workstation (ubuntu 64 bit 17.10) USB port

  • Launch the LoRaDevUtility by $ java -jar ./LoRaDevUtility.jar

  • The LoRaDevUtility GUI show a “Finding Devices” for about a minute without result

  • in the meantime the shell shows:
    Trying to Connect: /dev/ttyACM0
    Connection Successful
    Disconnection Successful
    Tool List Refereshed
    No Server in List

  • Next, when I try “Module-Boot Load Recover” from the menu I get
    BootLoadRecovery and after a while it come back to the home GUI.
    In the meantime the shell shows:
    Trying to Connect: /dev/ttyACM0
    Connection Successful
    Tool List Refereshed
    No Server in List
    In Baud Rate Handler
    In Data Bits Handler
    In Stop Bits Handler
    In Parity Handler
    /dev/ttyACM0 Bootloader: v1.02
    In Baud Rate Handler
    FF
    08
    1D
    3C
    FF
    BF
    85
    FF
    00
    00
    0F
    E0
    0F
    40
    READ_VER
    55000000000000000000READ_VER_DONE
    READ_VER
    55000000000000000000READ_VER_DONE
    READ_VER
    55000000000000000000READ_VER_DONE
    READ_VER
    55000000000000000000READ_VER_DONE
    READ_VER
    55000000000000000000READ_VER_DONE
    Trying to Disconnect: /dev/ttyACM0
    Disconnection Successful
    No FED Selected by the user
    In Bootloader Failure

So I imagine the tool is able to connect to the device, but there is some problem to set/get information from it.
Do you have any suggestion about this issue ?
Thanks