To upgrade from an older version, download the installation package for the latest version. When your browser prompts you for starting the download, it is recommended that you choose "Save to disk" option. This way you will have a backup copy of the installation program on your hard disk. You can also save the package to a floppy disk for backup. All files are super compressed and will fit on one diskette.
Run the installation program.
See help
for general instruction about download and installation.