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Flight Simulator
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Addit! Pro For Flight Simulator 2004

I'm having trouble installing and using Addit! Pro with Windows 8/Windows 7/Windows Vista. Any suggestions?

What is necessary to run Addit! Pro on Windows 8/Windows 7/Windows Vista?

The latest releases of Addit! Pro are fully compatible with Windows 8, Windows 7 and Windows Vista as follows:

Addit! Pro For Prepar3D, version 8.0.1+ is compatible with Windows 8/Windows 7/Windows Vista
Addit! Pro For Flight Simulator X, version 7.3.6+ is compatible with Windows 8/Windows 7/Windows Vista
Addit! Pro For Flight Simulator X, version 7.0.11+ is compatible with Windows 7/Windows Vista
Addit! Pro For Flight Simulator 2004, version 6.5.2+ is compatible with Windows 7/Windows Vista

Earlier releases of Addit! Pro For Flight Simulator 2002, Combat Flight Simulator 2 and Flight Simulator 2000 may not be 100% compatible.

Do I need administrator rights?

Yes, administrator rights are necessary to properly run Addit! Pro. Be sure your login account belongs to the Administrators group. Note a "standard" user is not sufficient, only an "administrator" will work flawlessly.

User Account Control (UAC)

User Account Control can either be enabled (default) or disabled:

  1. Click Start then Control Panel.
  2. Select User Accounts then Family Safety then click on User Accounts.
  3. Under "Make changes to your user account", click "Turn User Account Control on or off".
  4. Check or uncheck the box "Use User Account Control (UAC) to help protect your computer" then press OK.

What about permissions?

Folder and file permissions can pose a problem if Addit! Pro does not have adequate authority to write to data files. If you have trouble with Addit! Pro installed to your preferred location, try changing the location to some other drive and/or folder.

In addition, make sure the folder and files in your simulator game folder are not flagged as "read-only" as this will cause conflicts with any application attempting to modify files there including Addit! Pro. From Windows Explorer, select the FS folder and uncheck the “Read Only” button. Click apply and it goes through and changes the attributes for the folder and the files.

Shortcut compatibility settings

It may help to right click on the Additpro.exe file, select properties, then open the compatibility tab and select Windows 98.

Addit! Pro installed fine but I'm getting a message 'Error #339: Component 'comdlg32.ocx' or one of its dependencies not correctly registered: a file is missing or invalid'. What should I do?

You probably installed an earlier version which could fail to properly register certain DLL and OCX files under Windows 7/Windows Vista. First, uninstall Addit! Pro then download and install the latest version to correct the problem.

Otherwise, you can fix the error by following these instructions:

First, be sure your login account has administrative privileges (see above). Now, use the Windows Search feature to look for this file under your Windows folder. Is the file there? If it is, you must first unregister then reregister the component as follows:

  1. Close Addit! Pro if it is running.
  2. Press the Start button.
  3. In the search box type:   
    CMD
    but DO NOT hit ENTER yet!
  4. Right click on the "cmd" icon up top and pick Run as Administrator. This is very important.
  5. Click Continue to verify.
  6. In the DOS box, navigate to your Windows\System32 folder by entering:
    cd\windows\system32
  7. Verify the DOS prompt changed to C:\Windows\System32.
  8. At the DOS prompt enter:
    regsvr32 comdlg32.ocx /u
  9. You should get a pop-up indicating success. Now enter:
    regsvr32 comdlg32.ocx
  10. You should get another pop-up indicating success. Now close the window.

Run Addit! Pro. You may encounter a similar error but this time with mscomctl.ocx. Repeat the procedure above to re-register this file, too.