As of patch 1.1.0 there is a problem running the game on nvidia GPUs. Game crashes to desktop instead of going to the main menu. It appears the problem is only in the MainMenu files and only on a single setting - Reflection. It can be solved with some thinkering.

To get around it follow steps below:

1. Open the game folder (right click on the game, properties -> installed files -> browse)
2. Navigate to Packs/Maps folder.
3. Create some folder, name it as you like - i.e. bak or temp
4. Find all the files with names starting with "MainMenu_"
5. Move all those files to the folder you created in step 3.
6. Launch the game. Game should launch to the menu but instead of the background with your mercs, it will be black.
7. Open Options -> Video and change Reflections to anything other then Medium or High. Off, Low and Ultra are ok. Apply the change. Don't try to play yet. You do not have some necessary files.
8. Close the game.
9. Restore the "MainMenu_" files to their previous location.
10. Restart the game.
11. Game should now go to the main menu, background with mercs should be there.

It may be that in your case Reflections is not the problematic option. We need more reports to confirm that. If you will still have problems, repeat the steps 4 to 6, but instead of changing the Reflections only, manually change all options to the lowest possible setting. Then close the game, restore "MainMenu_" files, restart the game. If it launches to the menu you are almost there. Now try to setting up your options one by one, applying the change after every single one. If it crashes again, just restart game (that last change should not stick and it should launch) and skip that option or try different level.