Since it worked, it's most likely not your CHAR folders that were the problem, so you if you did adjust them, you can drag your CHAR files back where they were and overwrite any new files the game made.

There is a good chance returning to Yanxia will crash you again. It could be a bug, or a graphics issue, or a problem with your patch files as I mentioned. Although the method I explained will identify which patch file this is, what will ultimately solve a corrupted patch file is reinstalling and redownloading the entire game.