Hi Tipper, it's a bit pc techy speccy. You will need to know how to deal with Iso. files so that you can mount the file and read it. As the manual date has expired, you need to turn the clock back to 2003 to open it. It should then work. Sometimes doing that will knock you offline. But correcting the date and rebooting fixes that issue for me.
It's quite a big download size, over 600mb, which is more than some connections can handle. It's a bit complicated I know. That's why I took the time to make the screenshots.
What operating system do you use? I'll see if there's a free 'iso mounter' available for you. Or, you could just google it.