05-19-2017 09:05 AM
When downloading the firmware, you also get a folder with the install instructions. I followed the part where you connect the camera to the computer, and install the firmware directly to the camera via EOS Utility. And yes, it was just to select the older firmware and otherwise just follow the prosedure.
Use a card reader if you have one. The direct installation method is error-prone, and the slightest misreading of the instructions can brick the camera.
At least that's how it used to be; I haven't tried direct installation in quite a while. But several years ago I bricked my wife's XTi and had to send it to the Canon shop for restoration. Canon was very helpful and did it for free, but it was inconvenient and embarrassing. Doing it with a card reader is easy and straightforward.