Aah hah!

Remove old Win MX, install new WinMX from here.

http://www.winmxworld.com/tutorials/winmx_fix.html

I only use the damn things to find versions of songs that I can then arrange and perform as arranged, so I don't really feel like a pirate!

This is why things like Limewire are not a lot of wonderful for me - nothing I want to perform available there!