Hi all!

I have 3 different versions of Bobcad, 21, 22, and 23. I never really liked 22 or 23 and have been using 21 for years. Well, my laptop died the other day. I purchased a new one and when I got into my disks I could only find 22 and 23. I think I remember downloading 21 as a trial version and then buying the license to activate it. So, my question is does anyone know where I can download 21? Looking at their website they only support the last 5 versions. Can anyone point me in the right direction? As always, thanks!