This has already been reported in this thread : http://forums.amd.com/game/messageview.cfm?catid=443&threadid=163431
It only affects AMD graphics cards running under Windows 8 (and Win 8.1 Preview). I have carried out many tests, including re-installs, without success. For information, the cards I have tested with are HD 5450, HD 6870 and HD 7850 using all drivers marked for Win 8, including the latest beta version, 13.10 betav2.
When train.exe starts, it immediately reports that "train.exe has stopped working". Nvidia cards work (using their latest drivers) without problem, so it would seem to be that the AMD drivers are looking for some file/s which either don't exist under Win 8, or are in a different location. The same drivers work OK under Windows 7.
I appreciate that we users of Microsoft Train Simulator are in a relatively small minority, but a large number of us use AMD cards. Currently, we have the options of changing to an Nvidia card (which can't be good for AMD!) or remaining with Windows 7.
Any help on this matter would be most welcome