This did run, but with some PC shuffling I've made some hardware changes that I think is responsible, but I have no clue how to resolve it.
It's on the same pc, but the graphics card got replaced with a nvidia GTX 260 from a 580 (580 needed elsewhere). It was on a TH2Go which is now a single montior with 1680x1050 resolution. I also installed TrackIR5. So 3 major changes, but how and why this should cause this app to not load at all is beyond me. Poor handling at launch of hardware changes if thats the case. Anyway, this is NOT a Steam version. I also tried placing a '--console' at the end of the target based on a thread I saw, but the window still disappears, so I can't see any messages if any as to what's wrong with it.
Help appreciated, thanks.