Windows Media Player driving me mad

I been having a session on ripping CDs and reorganising my music.

I have a file MyMusic which is also known as a Library for Win7.

Just recently I bought a Western Digital 'MyCloud' single disk
nas/backup box and enabled the file sync facility.

It soon became obvious that all my hard work using Mp3tag to
get the metadata correct was being 'undone' by some mysterious
process. This is driving me crazy. As fast as I correct what
is happening, as soon as I play some music it all gets undone
and literally hours of work just vanishes.

Google came up with the reason, apparently WMP has an obscure
tick box that defaults on ON and it goes off to the internet
and not only changes the metadata, it alters the filename !!
and then moved files to where *IT* thinks they belong.

It's almost as though someone has thrown the whole lot up in the
air and whatever directory they ended up, that's where they stay.

Meanwhile WD sync sees all this activity and goes berserk trying
to keep the NAS box in sync with the main PC !!!.

I have done what the internet suggests, stop the WMP network
service and delete all the *.wmdb files which should allow it
to rebuild its music library, however I would rather download
or pay for a better one.

So, can anyone suggest a replacement for WMP. I listen to a mixture
of music and also have a collection of foreign language CDs and
stuff like the British Library rain forest cacophony.

There is something called minim server written by someone who
needed a better server for classical music. Does anyone use it ?.

A decent network player is next. My Humax HD Fox T2 STB only
plays MP3 music. I need something that understands FLACS and WAV
files too. The latest humax offering with networked media players
also only plays MP3's so that's out.

Another oddity, is that my BT Hub3A has a USB port, and a usb key
loaded with music (or anything) shows up on my PC as a networked
file system, but the Humax doesn't see it.

Andrew