MapsYou could always open MP3 Stunts title map types in MP4 ExtraWorld title map editor, but result could differ of what you expect.
You have to revalidate them and recompute shadows, sorry for that !!
Uploading mapsExtra world didn't uses anymore Mania Exchange to enable world records and online features inside ExtraWorld title pack.
You have to upload your maps here.
Race mapsMP3: Map type was "StuntersRacers".
MP4: You have to select "EW Race - Time Attack" map type.
Stunts mapsMP3: Map type was "Stunters".
MP4: You have to select "EW Stunts - Score Attack" map type.
Reach Score mapsMP3: Map type was "StuntersReachScore".
MP4: You have to select "EW Stunts - Reach Score" map type.