The EGL general preferences identify the default names of folders that are created for you in each EGL project.
The default folder name is EGLSource.
When you are working in a specific project, you can rename a source folder and create new ones.
The default folder name is EGLBin.
When you are working in a specific project, you can rename an output folder or specify a new default name in the EGL preference. The effect in either case is to retain a version of the IR files that were in place at the time you made the change. Future output is placed in a folder that has the name specified in the EGL preference.