At the top of the image included in your post, you can see that the name of the file is csx777_manual1.pdf, which is the manual for the 777 Captain (FSX/SE/P3D3), so at the top of each page you should see ‘777 Captain’ MANUAL Part I – User’s Manual, where I would expect to see ‘777 Captain III’ MANUAL Part I – User’s Manual.
I decided to test to see if I would get a manual sent for the 777 Captain III [MSFS2020], so I uninstalled all of them, and after reinstalling them I never got any manual sent.