"Can this program read FTM2012 files directly - or from a gedcom made by a FTM2012?"
On the GENViewer "File Open" window it lists files of type ged, paf, sub, tmg, pjc, ftw, fdb and mg
What I do is export my FTM 2012 to a FTW GEDCOM file and then open Genviewer using that exported file. I have never been able to use a FTM 2012 file directly to open GENViewer
It looks like it will DIRECTLY open Master Genealogist, Legacy, Root Magic files, and FTW files [though it doesn't say which FTW files it will open--I used to use it to open directly my FTW 2006 V16 files and it worked fine]