v4.7    9/19/89, Fixed sorting problem when sorting the contents of a
        compressed file by file extension.

        When using F2 (SWITCH DIR) if a drive is specified but no path
        is specified SHEZ will use the current default path for the
        specified drive.

        Reworked the filename display when viewing the contents of a
        compressed file.

        Added the ability to view the contents of self extracting
        files.

        Added the ability to convert self extracting files back to non
        self extracting compressed files.

        Added an exit prompt when using the ESC key to exit.

Shades of things to come:

    Ability to created self extracting files.

    Ability to to copy and/or move files from one compressed file to
    another.

    Support for path's in the large model of SHEZ.