I also notice that the game was fine on my PC during both beta. On the first day, June 2, it got one crash. But yesterday was the worst day with many crashes, and I gave up at the end.
My char at level 56 now and I am too scary to play the game again as everytime, I had to turn it off and on agai.
I still don’t understand why it was running well, then few days later, it crashed.