If you downloaded 1.3 yesterday, it was probably the first release of the installer, that didn't check which FS9 executable you had (cd or no-cd), and always installed the >2GB version of the Addon Manager.
To fix it:
- remove bglman.dll from fs\MODULES folder
- download the Addon Manager for FS9 stand-alone installer (or Zurich, but the stand-alone is smaller), and install