Bernie
As I recall, and forgive me, my memory is not that good, but I believe there was an upgrade to the BK 5.2 program after the windows 3.1 that made it compatible with the newer Windows programs. I started out with the BK 4 programs and have upgraded with Mr. Steed along the way. I love his program, I love the price (reasonable) and now am enjoying the BK 6. It worked well with my vista and now the Windows 7 64 bit.