Hmm, I thought perhaps the manual just wasn't done yet, didn't realize till I saw this thread that I was supposed to have it. Perhaps I just missed a step when installing.
i get a 'could not launch Twilight manual at the expected location', then it says where it expected to find it.
Upon looking in that directory, no pdf exists. Did a search of the entire drive for TwilightManual.pdf, still nada.
Did a search for *.pdf, and no GC2 manual (neither vanilla, DA, nor Twilight) showed up. In fact, suprisingly, I only have 4 pdf's on my entire HD, one of which, manual.pdf is for Sins. Did 'switch chapter' over to DA and DL, hit the 'manual' button on both of those, and it gave the same error message (it was still looking for "TwilightManual.pdf" for both of 'em).
Button for the editors work (first 3 available, bottom 3 greyed out, tried one and it opened up fine), as do the other buttons off that menu.
Just to note, I installed via Impulse, rather than SDC.