Hot off the press. New features: https://www.celemony.com/en/melodyne/new-in-melodyne-5

Review from SOS: https://www.soundonsound.com/reviews/celemony-melodyne-5-exclusive-full-review

Thanks! I had not heard about it yet.

To get the chord track from Melodyne 5 into Reaper
Export > Format > Lead Sheet(.mid)
ReaTrak chords from midi item.lua

To get chords into Biab File > Import > Import Chords from MIDI file.