Here a little help for solving Windows store problems for all who tried to change region/ time zone and that somehow messed up your store:
- Type Powershell in Windows Search. Right-click and select Run as administrator.
- Type in the following command in the Powershell “Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}”
- Restart your PC after this process ends.
After that, Store downloaded the MSFS launcher again and let’s you know that you will be able to install it properly once it becomes available in your region.
And very special thanks to @DiscreteDeer236 who with his previous post made me google how to fix the store.