As a couple of people have noticed, the recent release 6.2 of Notepad++ includes some significant changes to language definitions. The current QlikView language file will still work as before but menu access to the language definition screen has been moved under "Language" instead of "View". I'll update the installation instructions as soon as possible.
The new version of Notepad++ supports some new capabilities for defining languages and I'm working on a new version of the QlikView language file to make the most of them. Watch this space!