Minimserver running on Raspberry Pi GUI not responsive

[ADW]

Apologies if this has been covered. I'm a complete newbie to the pi and to Minimserver, though I was pretty familiar with Unix some 30 years ago

I've just bought a Pi 3b, installed the latest version of the Debian OS from the Pi site. I'm running it headless from a MacBook Pro. I've loaded a big bunch of music and just installed 0.8.5.2 as per the (excellent) instructions on the Minimserver site.

I've configured it to integrate with the desktop of the Pi GUI and indeed the Minimserver icon has appeared on the desktop.

However if I try double clicking on the icon, I get an hourglass for a short while, then nothing. There's no indication that Minimserver is running.

If I run it from terminal on the Mac I've been able to start the server, indicate the content directory, and it appears at least to be populating the MinimServer.log file

Apologies if this is a really dim question but what do I need to do to get Minimserver responding via the GUI?
thanks for the help, more dim questions to follow I'm sure

(My ultimate aim is to use this setup with a yet to be delivered Primare amp with built in streaming capabilities, so I'm still ahead of the game!!)