16-bit support was PBP v2.xx or even v1.xx and for much older 16-bit parts. Anything worth using today has never been supported. When you look into the 16-bit architecture, it uses 16 Working Registers (as opposed to the 1 for 8-bit) and a bunch of other things very different from our familiar 8-bit PICs. Even Microchip MPLABX uses different Compilers for the 8- and 16-bit parts. I think I can speak with 99.99999999% certainty that PBP will NEVER support 16-bit PICs.