Justo: Firmware upgrade via Upgrado not possible?!?!

[ja19sta]

Hello,

with my brandnew Justo + Sterzo i wanted to explore the Zwift/Watopia countryside - Zwift asked me to upgrade Sterzo to get the steering feeling - after installing the Upgrado-App i managed to install the new firmware for the Sterzo
then i checked the Justo for new firmware - which was found - but i was not able to install - said i should cut the electricity of Justo and try again - did that three times no success, gratefully it kept the old firmware
So i wonder if i really need that firmware update - could not find anything about features / functions in the forum/www
- respectively what to do to get the new firmware up and running.

Kind Regards,
J.