Thank you. I downloaded and installed that version. It seems to have picked up my old license as there were no requests when I opened it, but m4a audio still won't play in MusicStation. Any idea how to get it to pick up the Cayin conversion? (Other audio formats do play, so it isn't a general failure.)
It replaced open source licenses with 'paid for licenses', the QNAP codex pack was removed pretty much at the same time as Cayin Media Player was introduced. I have a feeling because the terms and conditions of the codecs used were "not for profit' (and QNAP sells products for profit)