You have to be a Super Admin to do that. It is in the Club Settings section (on the right side of the screen, in the Manage Club section)
How to change club image + name?
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I don’t think you are able to change the name
Thanks guys! I passed that on to the person who started the club and he has changed the avatar 
Hi, I don’t have any clubs myself so I’m not able to explore the admin tools. One club I’m in is interested in posting an image for the club, and perhaps changing the name.
Would anyone be kind enough to share good instructions on how to do those things??
Thanks!