I know this thread is a little stale, but I thought I should add what I have found so far to be absolutely the simplest and best solution to playing my music in the house from my NAS DLNA server.
I tried BubbleUpnp and many other players, and generally hated them all. Plex is just vile, and I refuse to ever test it again.
But what I found that is sooo easy is the Hi-Fi Cast app on Android. This DLNA player works seamlessly with my DLNA servers (both on a Seagate NAS and Netgear ReadyNAS), and the best thing is that it immediately makes a connection to either my ChromeCast Audio device or my LinkPlayer wireless receiver at my main stereo.
The IDER LinkPlayer receiver I have uses many different wireless protocols - I use the TuneBlade app to send MusicBee audio wirelessly from my computer to the LinkPlayer Airplay receiver, but I am not sure what protocol Hi-Fi Cast is using (nor do I care - it just works!). The IDER model that I have is no longer available, but there are numerous other options available, several for under $40. The YunListen or AudioCast receivers seem very similar.
Hi-Fi Cast is about the only thing that has both a simple, clean and functional interface AND works perfectly with BOTH ChromeCast Audio and a LinkPlayer wifi receiver.
One last very simple option for streaming from a DLNA server with a computer running W10 is to just select the DLNA device in file explorer and right click on whatever you want to play then select "Cast to Device". Of course, this requires that you have a compatible receiver on your network - it does not work with ChromeCast, but it DOES work perfectly with a LinkPlayer wifi receiver (probably because the LinkPlayer has a built-in DLNA player) - no other software is necessary.