That was the first thing I did.
They have the cc commands section: 49 0-127 Emulates Stomp footswitch mode's FS1 ...
58 0-127 Emulates Stomp footswitch mode's FS11
59 0-127 Emulates EXP Toe switch removed.
Which I think is a shame, because you can no longer "mirror" the Helix with the appropriate Midi controller (e.g. Helix Stadium on the desk, MIDI controller below). I can no longer trigger the toe switch (or Exp Ped toggle) externally unless I have overlooked something?