SiK radio problem after upgrading to firmware 2.0

Hi everyone, newbie here. I made the mistake of letting QGroundControl update my ground radio (ostensibly to 2.0), and now I can’t figure out how to downgrade it again.

I’ve found what I think is the right firmware image, and I’ve got the updated radio connected in a console interface in linux, but I can’t figure out how I go about flashing the radio’s firmware.

Any help would be greatly appreciated, as I’ll otherwise just have to buy new radios…

Realized that I forgot a crucial piece of information in my last post. I’m on MacOS, and cannot use Windows (and threfore Mission Planner) to reflash my radio. I am aware of the reflash capability built into MP, I just can’t take advantage of it…