Working on different projects? Always opening the files associated to a project while closing the files associated to another? Do you work on multiple computers and you always have to re-open all files you are working on?
When you run the file "saveEditor.m" it saves a list of all files currently opened in the editor in the form of a new .m-file. When you run this file all files in the editor, at time of the creation, will be opened at the same time (while closing others). So basically it allows you to save the state of the editor.