Miles to kilometres

Richard, I just signed up but already have a problem. I can't change from miles to kilometres. I had asked thhe question some time ago, and got answers. But now that I am anxious to give CT a trial, I can't make the advice work.

To begin with, I can't find 'user settings'. Presumably if I could get into that, then I can click 'my bike', 'profile' and then find the toggle. I can get into 'my bike' but when I go there instead of 'user profile' and can't get to change miles to kilometres. Please advise. Thanks