OK, so I go to:
http://tdm.otaku42.de/ and I download TDM-Modpack ver 3.40 for Gold (I already have it installed, but what the hey, its just a test). The exe does its search, and wants to load the TDM Modpack to folder:
C:\PROGRA~1\SHRAPN~1\MALFAD~1\Space Empires IV. Which is not where SE4 is installed on my system, its in folder:
"C:\Program Files\Shrapnel Games\Malfador Machinations\Space Empires IV Gold\".
I think when I loaded the TDM modpack most recently, I selected another folder, then moved it in file manager to where I wanted it. Apparantly so did Fyron. Mephisto, the .exe may need some tweaks to help out some total noobs.