I've included a FLStudio 11 song template using the same principles to record the MIDI output of B-Step into the piano roll of FLS, via another plugin as it is not possible to do this (I don't think) in FLS at the moment.
You need to dl the Melodo plugin for this to work. It is explained in the video and I have included basic instructions in the song template. Put it in your template folder and it will be available from the file menu for easy access.
The recorded notes will probably need to be adjusted to bring them into sync with how you want them, as Melodo is not synced when it records the data.
This is handy if you want a more conventional way to edit the notes and midi data you come up with in B-Step.
You may need to use the latest Winrar to unzip the file.
I'm not really a Bitwig user and have no idea how to record the MIDI output of a plugin in Bitwig. Are you member in a Bitwig forum - can you ask there? Otherwise I can test for you - soon as possible.