Why this date September 19th ? I myself could get the new client without removing the old before this date.
If you are sure his problem is due to having the old client, so it’s ok, but removing a version you can’t get anymore before being sure it will enable install of the new one is very risky as he could have nothing after. If there is (simple?) a way to recover the deleted one in all cases, so it’s ok.
I myself prefer keeping versions I can’t get anymore, to seek out regressions on the new one, compare altered features to how it was before, or in this case get achievements for a title you can’t get anymore in your Gamertag account gives a little ‘prestige’ / fetichism some retrogamers like me enjoy
@DisloyalEight88 you have the same problem as me, add the folder in the Avast exclusions list and then after repair it’ll work. But you’ll have to refresh it on each update as the folder name includes the version number (don’t know who at Microsoft had this strange idea), unless you exclude the whole WindowsApps from Avast analysis.