What's your vmem percent after 1-2 games? Because mine has gone up from 30-40% (after 2-3 hours of constant playing) to 50% after 1 game. That might be causing the hang (and crash?)
If it's super high, like 80% or higher, this thread might have a solution: http://www.aeriagames.com/forums/en/....php?t=2339377
All it does is increase the vmem the AVA process is allowed.