Perhaps they should consider giving us an update that wouldn't require using Couatl.exe or Addon Manager to install KSFO. I've also tried the steps as directed to no avail.
I doubt, that would be possible, since couatl.exe is an essential part of the scenery... would rather they found the problem with it...
KJFK (and older sceneries) installed in OFFLINE 'mode', is working - but when you installing KSFO 2.0, everything 'goes down'... Also, couatl.exe v2.0.0.2141 isn't working at all! Not as a standalone, nor with any sceneries... KSFO installed or not!
I got 2.0.0.2119 working, WITHOUT KSFO 2.0! When KSFO is installed with 2.0.0.2119 the problem remains...
This is because (I'm guessing) that KSFO 2.0 requires couatl.exe 2.0.0.2141 to function! And there's something wrong with that version, apparently!