OK, I have attached a stand alone app to take a PGO archive file and export it as a CSV file.
You start the app, choose an archive file (ie a file of messages you exported from PGO as a DB3 file) and then you choose the fields from the message table you want to export.
I recommend you choose at least the first 5 fields. (ID, number, date, subject, content)
Chose other fields as you desire.
Software is free, as is where is, no warranty, your mileage may vary, objects in the rear view mirror, etc and so forth.
Cheers,
Wilson.