[PD] receive UDP message from 224.0.0.1

[João Pais]

> However, you can check if some other program already uses port 57120! 
> On Windows you can do this by running "netstat -abno" in cmd.exe as Admin.
>
I had a look at the report, 57120 doesn't appear.
>
> Also, have you tried with other port numbers?
>
This is an open source app. In order to do that I would need to learn 
how to compile it etc. Not impossible to do, but impossible for me.

But see my reply to Dan for a twist.