Song Sergeant 1.6.2 has been released, which copes with two issues arising from a recent release of iTunes:
1) iTunes 12.2 allows the user to turn off the sharing of XML data with 3rd party programs. Indeed, new libraries default to not sharing this data. Song Sergeant 1.6.2 identifies the situation and tells the user how to fix it.
2) iTunes 12.2 includes more non-music items in its internal list of "tracks". Song Sergeant 1.6.2 now recognizes these as non-music and excludes them.