Caskbill's wife reported that the updates will not be made for many various reasons. I can tell you that Bill's programs were quite complicated and are written in a language that Microsoft rumors will not run on any future OS it makes after Windows 7.
And I've heard Windows 7 does not support the developers tools needed to re-write portions of the programs.
We still use Caskbill's programs to run the Rent/Trade board and the Availability board, but are only able to make minor changes to that programming.