The mirror site has problems. It appears that Compuserve no longer allows files greater than 1 MB. I cannot post the Build 136 upgrade there anymore. I'm continuing to try.
In the meantime, you can download the Build Upgrade at the www.flightsim.com/airportsupport site. This has only the build update, not the full install. Since this is a different server than the www.flightsim.com site, hopefully you will not have the difficulties that many have experienced getting files from there.
I'll keep working on getting good distribution sites.