Hi brazzy, after day looking for the program i didn´t found it , but i finally found what was the problem to transfer to wav from the JM4 if you have tle problem that you can save to the SD .jam but WAV not every time you tried say error writing in the sd you only need to take the SD put in the PC create a forder call LINE6 and with this should be work.
PLUS: I have soon metallica backing track in the WAV to the JM4 just let me know if you want .
this forum really need mor help of the people
cheers mate