Strange - not sure why it's happening. Anyway, QDK only used this component for the "bubble tips" that display on things like the room alias textbox. It seems to in fact be unnecessary - it works just as well without this component.
So, I've updated the build and setup package for Quest 4.04 to remove this component. Please download the updated file from
www.axeuk.com/quest/quest404.exe and let me know if it works - if it does I'll update the Quest Pro package as well.