Changing skin color. etc.

[Andrew]

Why when I change player skin color ir appearance.rdat then go to that player in game and game crashes?

[Abgobryu]

It's most likely because you're editing the file with Notepad, which can't properly open or save the data in its original format. If you did use notepad, try again with Notepad++, Atom or any other more complex text editor instead.