It would be nice if Freevo comply this specification:
http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
then ~/.freevo/cache appears to be ~/.cache/freevo
~/.freevo/data to be ~/.local/share/freevo
~/.freevo -> ~/.config/freevo
and so on
Its unlikely that freevo 1.x will comply with this. Its a case of don't fix what isn't broken.
Freevo 2 on the other hand might.