As explained in other threads, those messages are not a problem, it's just saying the first server is down, but the download succeeded on the mirror. In fact, we already updated the installer to give that warning only if *both* servers would become inaccessible.
About FSX crashing on exit, it's surely not caused by GSX but, most likely *another* module that is causing issue. If this is the case, one can find conflicts between modules this way:
- Open you DLL.XML file with a text editor (eg. Notepad is fine), the file is located at %APPDATA%\Microsoft\FSX
- Look for all the <Disabled>False</Disabled> lines, and change them to <Disabled>True</Disabled>
- Do this for ALL the <Launch.Addon> sections, EXCEPT for the Addon Manager one (bglmanx.dll) and the main section at the top of the file (which would disable the whole XML file so, you shouldn't change it)
- Save the file and exit.
- Do the same for the EXE.XML file, located in the same folder, disable all modules EXCEPT for Couatl (fsdreamteam\couatl.exe)
- Save the file and exit
- Launch FSX and see if it works. If it does, re-enable every module, one by one, check if FSX works, enable another module, and so on, until you find the conflicting one.