You could always try Google. I googled "canon eos r control ring adapter", and immediately found the UK support page: https://www.canon.co.uk/support/consumer_products/products/cameras/rf-lenses/control-ring-mount-adap...)
The "Firmware" tab there currently shows no updates. I woud guess if there was an update, they would tell you how to install it. Camera updates, for example, come with a PDF instructions file.