Hello!
Thanks, that was also my problem apparently. I'll explain how I very, very simply solved the issue.
My software is installed in C:\Program Files (x86)\SimCity 4 Deluxe Edition. This is apparently not a standard folder for DAMN.
I created the folder C:\Program Files (x86)\Maxis, then with the command prompt (cmd) with administration access I created a soft link with the following command:
mklink /D "C:\Program Files (x86)\Maxis\SimCity 4" "C:\Program Files (x86)\SimCity 4 Deluxe Edition"
Then I modified the SimCity 4 shortcut's "start in" to "C:\Program Files (x86)\Maxis\SimCity 4\", and it thinks it's accessing Maxis\SimCity 4 while it's really being redirected to the actual folder. I ran the DAMN Indexer from the DAMN folder I accessed through Maxis\ in Windows Explorer in order to update the index with the correct Maxis segment.
Works like a charm. Might even work for Steam users!