Legrand/bticino firmware update

I amb controlling my lights with legrand with netatmo switches. Some of the non-wired switches, the latest ones installed, have an older firmware version than the rest and I do not knod how to update the firware or force the firmware update.

Does any body know how firmware update works in legrand with netatmo devices?

I remember that during the initial setup of the gateway, i received a message from the legrand app informing that a firmware update was requiered

Thanks