If you download software on one computer can you download it to another computer and plug radio tx into the one you want to use? Say one at home and one at work? Or do you have to buy a whole seperate g3.5 with controller for each computer you want to fly on?

you can put G3.5 on as many computers as you want. but only one can be registered and get updates.

but a way you could put updates on the computer thats not registered is copy the updates to a disk then put them on the other computer.