sorry for the late reply, I was kinda busy during the last days.
Okay, so here's the latest progress update:
I checked all additional requirements during the installation (always do, since I had problems because of that at the first time long ago).
I will post the dxdiag here later on, but more useful was retrieving the suprisingly short crashdump, which only listed the last attempt. Unfortunately it is German, but I will give you a rudimentary translation after:
Distant Worlds - Crash Dump - 188.8.131.52
01:02:32 Mittwoch, 26. Dezember 2012
System.ComponentModel.Win32Exception: Der angeforderte Vorgang erfordert erhöhte Rechte
bei System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
bei SaEfjpPqR5net5jLgZ.QDCoZqkGaDum5PfOLg.K0waM4vJNAFTAMW5oJea(Object )
--- COMPLETE ---
Basically the interesting sentence says (in clumsy English): "The launched progress requires higher rights."
Guess what: I enforced it as administrator 5 minutes ago and the addon launched. *head hits the wall*
Afaik Win 8 never announced this problem. Just the crashdump, which I could locate with your posted path, did it. "Run as administrator" on the game simply solved the matter after the new update from your side was online. Might even be a problem you know well.
Dunno why my computer developed the habit now.
DXdiag is listed below for the complete report. Maybe this case will help in similar ones further down the road someday. Thus this positive feedback instead of silence.
Thanks, and I hope I don't have to write a new post during the next hour, but there I am quite optimistic.
< Message edited by Remon -- 12/30/2012 9:23:54 PM >