Hey folks,
I try to tell in english. :p
I have downloaded the german version of Black Mirror 2 from here.
Now I am in chapter 5 at the ruins. Everytime when I want to give Ralph the whistle the games crashes and brings me back to desktop - no error message!

I tried to skip this part with savegames, but i couldn't use any I have downloaded from the internet. By the way, my savegames folder is empty, although I have some saves.

So, any ideas? Hope anyone can help me, please!

I haven't read about a crash in this situation so far. Have you already tried to uninstall / install the game? Maybe some data weren't copied correctly during the installation process.

If that doesn't help...
Where is the empty savegame folder? I only own the retail and the Steam version of the game. Both use the same savegame folder '\Documents\BlackMirror2\Savegames'. Is that the one you're talking about? Since you have already created some savegames the savegame files have to be somewhere. So I suggest you search for files named 'slot0??.sav'. Make sure that you have Windows also show hidden folders & files as well as file endings. You find these options in the folder options (control panel / appearance and personalization / folder options / view || Systemsteuerung / Darstellung und Anpassung / Ordneroptionen / Ansicht). If the gog version uses a different folder you can find it that way.