Ok, so I'm in the quest "To the Temple". After descending from the hill, I went left, saved some woman, gone a bit further, another quest name appeared "Woe to the Vanquished" and now I'm supposed to talk to the commander. Whenever I do that (or go further, past the commander), the game exits. I have updated the game to 1.1, it's the English version. Any solutions

Go to the right after descending from the hill,theres a passage near the prisoners,theres a dead soldier in it.It's the way to finishing the main quest.

Well thanks... But it seems there's no way to finish side-quest ?

Sorry to say, it's a bug. Try reloading an earlier save, so you can repick it from the Roche dialogue.