Sorry for that, I can`t help you I`m a total beginner.
And sorry for my next (maybe stupid) question.
I think I have a similar problem, with drivers (or something else):

- I have installed GS7 today (I can hear you laugh...)
- made a simple scene in WED
- pressed: build (it shows compiling screen with all ok)
- pressed: run
- that automatically started LITEC-7 (and again no mistakes reported)
- after that it showed a screen (engine, i suppose) but just for about 10 milli seconds and then closed it.

- I tried with a different options of (de)activating DirectX in Preferences.
- and so i tried many times - and always the same.

So, is this something familiar to you? Or somebody?
Thanks...