having same issue, game goes to boot up and crashes when it starts syncing achievements.
contacted support and went through there little list of typical troubleshooting before being told i need to learn how to clean boot and start programs 1 by 1 and deliver him a dxdiag and msinfo before they will investigate my problem.
when i asked if i could get a refund cause the update has bricked my game and is no longer worth the $175 they asked for it, i was told sorry your game has been launched and is no longer refundable regardless of the fact it doesnt work.