Hi Stefan,
Why would you think it is an issue? It says "if you installed a new senery". It's just a reminder...
As said already on the forum, the navdbapp scans the FS scenery to adjsut ILS data (localizer/glide antenas position/angles etc...). However FS protects the scenery files when it is running, so you need to shut FS to allow the scenery scan.
Regards,
JL