Some of you may experience this, others may not, but it happens to me every time I tried it.
In Game when you select the Admin button (5th one down on the left), then go to Edit Settings and while in Edit Settings you have 3 options at the bottom:
If at anytime you click Cancel on that screen your game will crash.
I have found no way around this yet.
Thanks for reporting, will be fixed in the next client patch!