When I select "Import from PowerPoint" from the Tools menu, the option to select my PowerPoint presentation from my copmputer does not show up but the system takes me to online help instead.

Hi Hilary, in the 2.4 version it is a paid for extra. The commercial 2.7 version has it built in.
It is quite easy to copy and paste from powerpoint anyway. I'd advise that you cut text from powerpoint and then pate it into notepad first. This is important as it will strip our all of the formatting code that comes with text from most M$ programs.
It is probably better to re-design your pages anyway.