i was just going to do this now but its already been done.
perhaps you are using an old interface definition file: MusicBeeInterface.cs
public enum NotificationType
{
PluginStartup = 0, // notification sent after successful initialisation for an enabled plugin
TrackChanged = 1,
PlayStateChanged = 2,
AutoDjStarted = 3,
AutoDjStopped = 4,
VolumeMuteChanged = 5,
VolumeLevelChanged = 6,
NowPlayingListChanged = 7,
NowPlayingArtworkReady = 8,
NowPlayingLyricsReady = 9,
TagsChanging = 10,
TagsChanged = 11,
RatingChanged = 12,
PlayCountersChanged = 13
}
the only place i need to put a missing notfication in is when the rating is changed while editing tags - thats done for the next update