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AI Flightplanner - Prepar3d V4 - Addons.cfg error

When opening either a flightplans.txt or traffic_XXX.bgl file I get the error message:

"Unable to read 'C:\ProgramData\Lockheed Martin\Prepar3d v4\Add-ons.cfg'
(ExMessage: Access to the path "C:\ProgramData\Lockheed Martin\Prepar3d v4\Add-Ons.cfg" is denied.)"

I click "OK" to clear the message and then I'm able to proceed with opening the file for whatever I purpose I had in mind. All functions appear to work correctly regardless of the error message.

My "Add-ons.cfg" file currently has 25 'packages' in it and P3DV4 is operating with no problems.

What is needed to clear the error message?

Thanks for any help.



Resource contributor
After re-reading you message I note the reason given by Windows is "access denied".

AIFP must be in "administrator" mode to access the ProgramData folder. Either start AIFP using "Run as administrator" or download the latest release of AIFP which automatically selects that mode (to avoid this exact problem).
Duh! Thought I had changed the properties to run "administrator" already. Never thought to check. Runs fine now.
Thanks, Don, for your response.