Here is a cut n' paste from the BWEP page.
* NOTAM:
A-BWEP Southern Alaska Default is for BWEP for SAK with the ORIGINAL PAVD airport.
B-BWEP Southern Alaska with PAVD is BWEP for SAK using the PAVD PayWare from ORBX.
If you do not plan on using the PAVD Payware airport, then select the default edition (#1). Users of BWEP Southern Alaska who are using the PAVD Payware airport MUST use payware edition only(#2). You can only have ONE edition of this scenery project activated in your Scenery Library at any time.
if you own the ORBX Payware PAVD then get 'B'.