If you can't find it in "%APPDATA%\PlaneShift\planeshift.cfg", you could add it (but search for it to avoid double entries, this file is not sorted alphabetically).
I've been triple checking myself, scrolling through it manually, then I use the 'Find' option in WordPad with different words, and I still come up with nothing.
I tried adding the line, nothing. Retitled and added it, still nothing.
I don't know why this one thing has become impossible for me!
So you are using Win? It doesn't make sense why mine would be so different (I'm Win Vista x64, but still).
Oh well, I appreciate all the help.
I'll have to come up with another solution I guess.