My opinion, which is just an opinion. I'm questioning "why" you feel you need to uninstall/reinstall the client to an old version. Have you experienced issues with the latest client? what issues?
I haven't seen issues with the CM client for YEARS.
fyi, I do not work for Microsoft, I'm just another admin, like you. I'm just questioning why you feel you need to create work for yourself. What problem(s) are you experiencing? Maybe instead of helping you try to 'reverse and return to an old version of the cm client', we can instead help you figure out what the solutions might be for the issues which are prompting you to feel you need to uninstall/reinstall the client to an older version.,