You could use your C10 as the Sooloos core, did you have a backup of your library that was on the NAS, how big is your library?
There is some good information here on
migrating data to a new QNAP NAS you should be ok and be able to just move the drives.
Hiya
Thanks for the reply and QNAP info - that's a helpful piece of advice.

I have moved the original HDD's over, and they are working (and yes I do have a back-up of the music files on a 4TB USB external drive) - but there is no trace of the Sooloos "plug-in" on this s/h NAS, so I don't know where it was "stored" - I assume there is a reserved space on the HDD for the plug-ins - or the plug-ins might be installed in the firmware on the old mobo, which is dead.
So, I'm hoping that if I can find a copy of the plug-in then it'll work with the s/h NAS firmware? Hence my question about which QNAP firmware supports the plug-in - I've seen reports on this forum, that later QNAP firmware doesn't work - but there also other reports saying that it does?
The C10 doesn't have any "storage" (such as HDD) so I can't use it to access my own music collection, as that was on the NAS. I'm not sure how using it as a "core" would help?
I can’t help with the Sooloos QNAP packages but am sure someone will be able to.
You may want to consider
Roon as an alternative to Sooloos?
No worries.
I've seen a lot about Roon - even that it's the same people who originally developed Sooloos and left Meridian, after Sooloos was bought. So it is an option for me to consider... but for now, I'm just concentrating of being able to listen to my music.
I do have a separate Sonos system as a backup (which was used at my office but has been moved to my home since the NAS failed), but due to it's hardware limitations, it cannot access all the music on the NAS, due to (IIRC) the 65,536 file limit in the Sonos firmware.
The Sooloos system has been used at home for ages. It has a better UI and all my music was on the NAS - that was until a different PSU (with the same type locking 4-pin connector) was plugged into the QNAP and it stopped working.
Regards
Tom