NUENDO's "Open in Wavelab" doesn't work.

I’ve purchased a full version of Wavelab 8.5,

When in Nuendo’s Export-Audio-Mixdown-window one can choose to “Open in Wavelab 8.5” in the Post Process-options.
I’ve selected this option various times but when my mixdown-export had finished, nothing happened…
Is there some link I’m missing or is this feature not working yet?

http://www.steinberg.net/forums/viewtopic.php?f=194&t=63493

Any help welcome, but it’s not a showstopper…
Thanks!
Niek/ Amsterdam.