Seems like they're having some disk problems at the moment, which could explain the missing files.
I never understood why some people only release Orbiter addons at AVSIM. One of the most frustrating things about Orbiter is having to track down addons from so many sites. Most of the time, if it's not on Orbit Hangar I wont bother looking for it unless it's a really really cool addon. Thankfully the majority of developers now release their stuff on Orbit Hangar too.
OH isn't perfect, either. It's had technical dificulties in the past as well. So make sure you're keeping your addons backed up.
As for "complaining about AVSIM instead of using it", I used it when there was something I wanted, which wsn't very often, and until now I never had a comlaint. Orbiter is a vibrant flight sim and the idea that we didn't generate enough traffic seems absurd to me, since they support other obscure stuff.
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