Hi,
The in-game panel does not have access to the file system, so we’ll need to remove the export (and also the flight import) options. It is a simple as that, unfortunately.
If you want to plan your flight with Navigraph Charts for MSFS then use our Desktop or Cloud apps, from there export flight plan to MSFS.
Load that flight plan in MSFS. When you open the in-game panel, that flight will be available in your list of flights.
Regards,
Stephen