I'm running into the same problem. I've tried fully uninstalling every FSDT program, the installer itself, the FSDT Addon Manager directory, deleting the old PackageCache, rebooting, reinstalling everything from scratch using the Universal Updater, running the live install to the default suggested FSDT directory, adding the Addon Manager to antivirus exclusions, live updating again, etc. Still running into the same roadblock of GSX not reading any AFCAD data.
Running a standard Steam installation. Log file included.
Scott,