This wasn’t clear to me at first.I also didn’t find it in the forums (maybe my search-fu sucks), so I figured I’d post this here.
Out-of-box, Sensel has a limited range in Bitwig. Octave up/down will be limited to +/- 1. Not exactly a plug-n-play MIDI keyboard.
To get it working, install the Bitwig script, then apply the maps for the keyboard in the Sensel app. Instructions are here:
http://guide.sensel.com/morph_software/#bitwig-studio-control-surface
After that, works like a dream.