You don't say which errors you got. Assuming you saw some errors about not being able to update some files, it's because we replaced one of the two Live Update mirror servers, so if you still ran with the old updater, you had a 50% chance of getting the server that is down right now.
To fix this, you must download and install the latest Stand-Alone Addon Manager for FSX, which will update the updater program too, that now connects to the right servers.
