Won't reinstall after not using for a couple of months - Game Services issue

I tried playing MS2020 on my Win 10 PC (up to date) after a couple of months away from playing but it failed to even start up.
I uninstalled but now it won’t get past me choosing the drive location to reinstall it. After a while of doing nothing the Install button becomes highlighted again.

I tried via the Xbox PC app but it says I need to download Game Services but that’s been done. It continues to report the same thing.

I’ve also done the Powershell removal of Game Services but no change.

Is there a list of repair steps for this problem ?

Thank you

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https://flightsimulator.zendesk.com/hc/en-us/categories/360001769531-Microsoft-Flight-Simulator