Hello Gene! Welcome to the forum.
Sounds like you might be dealing with a permission issue. Please open a terminal and type the following:
ls -lah /Applications | grep Navigraph
The output should look something like this:
If in your result, the 3rd column from the left says
root instead of your username, please run the following command from the terminal:
sudo chown -R $USER:staff /Applications/Navigraph Charts.app
If, however, this is not the case, please advise and we’ll investigate further!