Addon Managers For
Flight Simulator X
and Prepar3D

Addit! Pro For Flight Simulator X

Setup (or Addit! Pro) can't find Flight Simulator X. Help!

Addit! Pro looks at the Windows registry to locate Flight Simulator X. When Flight Simulator X was installed, the registry was updated. The Flight Simulator X setup program should have set the location where Flight Simulator was installed. It created this registry key:

Windows Vista/7/8: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft Games\Flight Simulator\10.0\SetupPath
Windows XP: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Games\Flight Simulator\10.0\SetupPath

The value of “SetupPath” above is your Flight Simulator X folder. For example, it might be “C:\Program Files\Microsoft Games\Flight Simulator X”. If Flight Simulator X was never installed (or was installed but later removed), this key will not exist. Also, you may need to run Flight Simulator X at least once before the registry is updated properly.

Addit! Pro uses this key to make sure a known version of Flight Simulator X is installed at that location. If Addit! Pro cannot find “fsx.exe” at this location or if the executable file is not recognized, an error occurs. Addit! Pro will inform you of the problem and present a dialog. You can then enter your true Flight Simulator X path. After validating the entered path, Addit! Pro will offer to update the Windows registry to fix the problem.

Setup finds Flight Simulator X but says it does not recognize the version
You must have a known version of Flight Simulator X installed. Addit! Pro is not designed to work with earlier/different versions (for example, Flight Simulator 2004). It is also not designed to work with future versions (for example, Flight Simulator XI). Addit! Pro works only with Flight Simulator X.

If you are certain you have the correct version of Flight Simulator, reinstalling Flight Simulator X will solve the problem. However, this must be done exactly as follows:

  1. Use the Windows Add/Remove Programs dialog to uninstall Flight Simulator X
  2. Delete all of the leftover Flight Simulator X folders and files.
  3. Reinstall Flight Simulator X.
  4. Run Flight Simulator once then exit the program.
  5. Reinstall Addit! Pro.