Here is the link to the download page for that user's manual:
Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information and items at the website indicated.
When you get to the RETREVO page, click on the blue DOWNLOAD THE DOCUMENT button on the left hand side.
Once you click on that and get to the next page, don't bother typing your email address in the empty box, it's not necessary.
Just TYPE IN THE NUMBERS SHOWN BELOW into the second empty box.
Then click the red DOWNLOAD NOW button.
When the computer asks if you want to open or save the file, CHOOSE OPEN.
Please comment back here to this page if you have any details to add, have any questions, have difficulty accessing the link, or just require further general assistance and I will respond as soon as I see it.
I hope that was helpful to you, good luck and take care.