The information is all still on archive.org.
http://web.archive.org/web/20080915184057/http://minniatian.republika.pl/Dune2/INDEX.HTM
I hosted all downloads I could retrieve on my own site, here:
http://nyerguds.arsaneus-design.com/dune/dune2tools/emc/
v1.17.4:
Adds a version info screen to show some information about the Dune II version that's being edited.
http://nyerguds.arsaneus-design.com/dune/dune2edit/d2editor_v1.17.4.zip