Cover Quality on Naim App

I Boys, I use your fantastic Serviio to share my music library from Mac to Naim Audio Streamer.
Its everything ok apart the images cover that was so little and with low quality in Naim App.
Someone can help me?
PS. I have the Serviio premium licence

[zip]

Try to replace this

  Code:

      <ThumbnailsResolution>DLNA</ThumbnailsResolution>


with

  Code:

      <ThumbnailsResolution>HD</ThumbnailsResolution>


in the generic profile (or whichever you're using)

Dear Zip,
thanks for hint, but nothing changes
I change the code in profile.xml , correct?

[zip]

yes, and restart the server / PC

Yes I restart everything, but nothing change
I can try to reset all library and reset Serviio?

[zip]

You can try to post detailed log of when using the app. You should get 2x resolution than before, 320x320.