Trouble changing key bindings in the Unreal editor.

In the Unreal Tournament Editor, where does windows store the configs files for the “play in editor” option to change the controls? I can’t find it in the “in editor” configs. Also I want to be able to back up my config files. I also want to know where it stores my Ue4 editor files for UT4. When the editor and game updated, I lost my previous key bindings for the editor.