nXt Commercial on Rhino Beta 5

Hi, I bought the commercial version - installed it, but it doesn't show up in Rhino. The nXt beta did and according to the installation routine the beta was removed.

Reinstalled it a second time - cause it was an update I was asked for the initial serial number. Installation process end with no error message - but still. No Flamingo in Rhino 5.

What am I doing wrong?