Saving and Linux launching issues

I can't really test these on anything but Windows, Mac, Mint, and SteamOS, let me know if this fixes any issues for you..

Saving after prestige should now work. The game thought prestiges were smaller save files, therefore wouldn't overwrite the save. - I did this out of abundance of caution early on

Crashes upon startup - I've improved the startup logic to not mix in Windows only drivers.
Please check you're not forcing any compatibility, Steam should ship the game with Sniper 3.0