Sorry for the lack of clarity. Good questions.

To generate the track (I should have used that term) look at the toolbar on the band in a box Homescreen.

Hit "generate and play" (Green button). If you want to generate again, hit the button again. If you are happy, just keep hitting play. You can also freeze tracks.

To export, look for the Button .Wav and look at the drop-down menu.

To export as midi, use the midi button.

those are your options for exporting.

I usually open MIDI files in band in a box and import them to a single track when I am in a DAW.

tell me how that works. I will be back at my computer tomorrow.