Ok this is funny.
When you get the error all you have to do is remove the last zero in the msi name
https://sdk.flightsimulator.com/files/installers/0.24.4/MSFS_SDK_Core_Installer_0.24.4.0.msi
should be https://sdk.flightsimulator.com/files/installers/0.24.4/MSFS_SDK_Core_Installer_0.24.4.msi
EDIT:
but maybe we should wait and see if this is really an update we should download.