I've noticed a couple of posts regard this error message: "The game client encountered an error while running. Shutting down the game client. (4049)."
The way to fix this is rather simple: Open task manager and go down to your Background Processes section, and simply end the "Blade and Soul by bloodlust" task running. All fixed~
Since no one's brought it up yet, as least as far as I've seen, the crashes could be related to the fact that this is 32-Bit BnS. It could just be an incompatibility issue with Windows 64-Bit. Who knows though. :/