If there is a SQLite folder, it must be updated too!
But, update with non-unicode version, for safety. It’s better have all files updated to the same version to avoid conflict between map, JCV, ASR,…

Other matter is I guess that Kenwood not use SQLite, only basic map (gmapsupp.img), 3D map (gmap3D.img), JCV, ASR and POIs; maybe, these files remain non-functional. Check the manual, or inform the specification of your device… It’s not possible to correct inform if you don’t tell the exact model.
And, check also if you have the last firmware.

Hope been helpful.