Patch leading to Crash
If this is the first time you’ve had this problem after a patch, consider yourself VERY lucky!
Arenanet can’t anticipate every crashing issue on every computer that may be used for playing GW2. Problems that occur on your combination of motherboard/video card/other hardware may not affect other people’s computers; problems on other people’s computers (which they fix in patch x.03) might then cause problems on yours, leading to patch x.04.)
This is part of why anet can’t release “just one patch” and why they often have to release subsequent “mini-patches” in the days after each patch.
Give it a day or two and a couple more mini-patches and these crashes should (hopefully) go away for everybody.