Hey, thanks much for your response. I was thinking of saving only a particular pattern, which would allow importing into other DAWS. The save-as-midi-file seems to save the whatever tracks of a song are MIDI. Thanks so much again!
Followup: I imported the "mixdown" of the MIDI file from MX6 into another DAW and the tracks were on separate tracks (I thawt they'd all be jumbled!), allowing me to export/copy/edit the desired single pattern in the the other DAW.