I think Leon is probably thinking of the WebHelp Default
If you select "Traditional style - no skin", you are
selecting an older style of WebHelp. One that does not use skins.
The Skins Editor is very aptly named. It edits skins! As you are
selecting an output type that doesn't use skins, you cannot
therefore expect to use a skins editor to make changes to something
it doesn't understand.
This doesn't mean you can't change the look of this style of
WebHelp. It simply means you will have to work a bit to accomplish
it. All the graphical elements exist as images. So you need to
simply hunt up the components and change them as desired.