Great, after installing the help server, help is available and working in my local language.
So how about installing the license and creating a new Test company?
The help text changes from Dutch to English. So I changed my client language to English too.
Help: "In Microsoft Dynamics NAV, in the Search box, enter Companies, and then choose the related link."
This helped
Help: On the Home tab, in the Manage group, choose Edit List.Can't find the Manage Group". Must be blind.
[EDIT} In the list of companies there is a "Edit list"