Actually, 'Digi Connect Programmer' is a SW product, which appears to be not so public now:
For example, a web search brings up
> Release Notes PN 93000950
> Digi Connect Programmer
> Version 188.8.131.52 04/08/2009
> Software PN
> Rev. E
So I assume Jim D is looking for this. It's a DOS tool which can use ADDP and do some low-level tweaks to a Digi Connect/Connect Port product.