Philippe, this stupid soul solved his own problem… I started the 32 bit version over and over again!
It seemed that Steinberg installs 2 versions WL: wavelab 7 and wavelab 7 (64). And because of the unclear menu structure (no general view) in Windows 7, I started (and did not see the other) WL 7 32 bit version!
Finally I found the other version 64 bit, and see…all the plugins are there, so I am very happy now.
Thanks for your help anyhow. And I learned a lot, again…