Firmware update of Elelabs EZBUSBA fails

Dear all,

I try to use an Elelabs EZBUSBA (EM357 chipset) in HA. Basically, both ZHA and Zigbee2MQTT work, but ZHA leads to a weird behaviour of my Zigbee power plugs. Zigbee2MQTT works as long as the driver is stable, which seems to fail after a while because of EM357 driver crashes.

Now I tried to update the firmware as recommended, but I fail. Has anyone the same stick and can help? Please find the story here: EM357 driver crashes · Issue #17181 · Koenkk/zigbee2mqtt · GitHub

See GitHub - Elelabs/elelabs-zigbee-ezsp-utility: Elelabs Zigbee EZSP Utility to perform firmware update on a range of Elelabs EZSP products as well as other generic EZSP adapters.

@Hedda: This was my first try, but

Elelabs Zigbee USB Adapter EZBUSBA (EM357 Silicon Labs MCU inside) TODO

So I downloaded the firmware file from here, but elelabs-zigbee-ezsp-utility only supports *.gbl files, not *.ebl files.