Thanks for the answer to the polite question
However, there is no xml file in the zip, so the installer doesn't work.
Therefore, i copied the two language files from the zip to the folders.
There is also a German version, but, as mentioned less politely before, there is no way to select another language.
Maybe it is possible to put the Dutch text in the en-GB language file and fake the system, but that doesn't look like the right way...
UPDATE: sorry for the inconvenience, copied them to the wrong folder.....
(as i said, i am new ...)
Thanks anyway for your help!