You're probably right, Bob (jazzmammal). I'd venture to guess that the only market driver that would get a 64-bit version would be if another competing software vendor came up with a program similar to BIAB, but with modern GUI and 64 bit operation. Given the size of the market, I don't think PGM has much to fear and less motivation to update BIAB to 64-bit, which is unfortunate for BIAB users. That said, if I were to look into my crystal ball, often cloudy as it is, there will come a time when OSs will be 64-bit only and 32-bit programs obsolete. Whether I will live to see that time is doubtful. lol.

Bob