Could you set the HTMLHelp title to something like "PureBasic 4.0 Help" rather than the default "HTML Help"? I typically have a lot of stuff open on my desktop and it would be helpful to be able to glance down at the taskbar and see what is actually what.
Like I said, it's a little thing, but it would be nice.
That's the same version I have. Keep in mind, however, that I'm using the English version of the help so if you're using the French, maybe that's the difference?