It was the Navigraph folder in %localappdata%/Temp that was the culprit. When I modified the security settings to that folder to grant full access to all users, the program updated the data in Community. Two folders there were created … Navigraph-ingamepanels-charts and navgigraph-navdata.
Thanks for your help and for getting back to me so quickly. If I can return the favor by testing things for you in the future, let me know.
Richard Carter, Ph.D
555 Oak Street
Indiana, Pennsylvania 15701-1974
724-349-7796