Editing metadata on Unitiserve using web interface

Have downloaded a few hi-res music files and stored them on a USB stick for playback on my Unitiserve.  Some of the metadata is wrong (e.g. genre) and I have tried to edit it using the web interface, but I can't seem to find a way to it.

Is it possible using the web interface (I dont have the desktop client, Apple user etc) ?

Thanks, Paul