Hi…,
The Navigraph In-Game panel is for MSFS only. There is no such panel for FSX.
The Navigraph Navdata Center if MSFS and MSFS addons only. If you don’t have MSFS, I suggest you uninstall Navigraph Navdata Center to avoid confusion.
To upgrade FSX addons, you use FMS Data Manager
Please see FAQ - Installing Navdata AIRAC Updates.
To display your aircraft icon on Navigraph Charts (desktop or cloud), you need Simlink installed and running and FSX running. Please see FAQ - Simlink Install and Systray
Cheers
Ian