I have removed all identical threads about this error. Please don't open identical threads for the same issue, which has been discussed many times in any case. Opening identical threads won't make your problem getting any more attention, it will only DELAY response time, because it will only duplicate support efforts in monitoring and replying to all identical threads. So, please, use only ONE thread, if the issue is the same.
I'm still entirely unable to replicate this problem, other than I sometimes get it randomly from all modules for all developers, but it happens like once in a month.
It seems strange that several users have reported it all at the same time yesterday. Is there something other software update that just came out you all installed ? A new antivirus update ? A new Windows Update ?
Just as a safety measure, I've re-uploaded all the bglmanx* files on both servers so, if you had the problem, try to reinstall any product (a scenery, GSX, or the Stand-Alone Addon Manager) now, and see if the problem goes away.