No the randomize function doesn't work either for me. The internals of the MP7 and the XL7 are identical with the exception of the sound rom (I have the Mo-Phatt card installed btw)
It's important that the developer knows you are having issues too, especially since it worked with the first version. I don't think he knows it's a version 2 change. You should post a bug up on the Sourceforge site.
He doesn't have an XL7 or MP7, so it's harder for him to track things down. Do any other editors work for you? Maybe there is a way to compare what gets sent, which might help him...
Cheers,
Andre