hyperdeck studio pro most recent firmware

Hi,

I got a lot of Hyperdeck studio pro (the old ones with the grey shape and the white 4K logo on the right). I got the new ones too the black 4K pro... I was updating the firmware of my machines but the old ones can't be updated as the software do not propose to do that even with usb connection... so I was wondering what is the most recent firmware I can put on those greyish studio pros...

Thanks
M/E

Then it is running the last possible version

It will only suggest to update IF the firmware has a newer package then is installed on the device..

Thanks