Galaxkey for windows allows in-place editing of a Galaxkey secured file. When user opens a ".gxk" file, the original file gets opened in the associated application. Whenever there is change saved in the original file, it is secured and update in the associated ".gxk" file. All of this happens without any extra effort from the user and behind the scene.
So next time you open the same ".gxk" file, all your last changes will be reflected in the original file.