In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Slant/Fin Hydronic Explorer
and they will send you a new disk for free. I had a computor crash and went to reload it myself and found it gone. The tech at Slantfin said they were having problems with it and They are doing some modification. I just got my disk in the mail today.
Gronski Plumbing & Heating