Hello,
Welcome to the Navigraph forum.
We will look into that warning and keep you updated.
For issues with stuttering in MSFS, please refer to this solution.
If you continue to experience problems, please send us the Simlink logs, which can be found in the %APPDATA%/Navigraph/Simlink/logs folder.
Thank you!
Best Regards,
Vishal Ahir
Navigraph