Thanks nosam but I'm still getting a "Can't init libshadow" error from the command line and the "play" button does nothing when I start from the menu.

I've tried from app menu and from deb files to no avail.

I'll try to reflash the OS to get a clean image to start from to make sure that it isn't something I *introduced* when installing and configuring other software.

I'll post back after to say if it works on my clean image, providing the wife doesn't go into labour before I get a chance!