Last time I downloaded a world update I had to reinstall everything. If you save a copy of the packages folder in C:\Users<username>\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache, then this could save you a lot of grief if you have to start over.
I cannot remember who it was on this forum who pointed out that you can back up MSFS, but thank you again if you are reading this.
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