I have the full version of Melodyne and you do have to export a BIAB or RB track as a wave and then open it in Melodyne, tweak it,then import it back to the PG programs.
Some DAWs that support Rewire will allow you to open Melodyne within the program and tweak it there.
PG doesn't support Rewire at this time.
Another wishlist item.
Carkins