After much back and forth with tech support, we finally got it figured out.
We never were able to get an EDS. Our only goal was to change the IP address of these modules.
We had to boot-up an old XP laptop with a older version of BOOTP, ver 2.3, to change the IP address.
Seriously, my new-ish Windows 10 laptop with BOOTP version 3.05 wouldn't work.
Anyone ever run into a situation that required an old version of BOOTP?