Thanks for the help!
The images were where they should be, and I verified that I am actually looking at the html in that same directory. It's something in Microsoft Edge browser that will not work with any of the help files in any Cyberlink product. Crazy.
I tried going to Win 10 Group policy and enabling javascript for Microsoft Edge, but it didn't work. I've done several other tweaks too but no go.
My fix was to set Google Chrome as my default browser, which opens the files perfectly.
Now that I know Microsoft Edge was the problem, I can get back to playing with PowerDirector 14 and all the other goodies in Director Suite 4. Lots to learn!