Ralf,
I have not read through the tutorial as I am mainly dealing with (hopefully) solids. When I need to import a surface, yeah, I'll probably look it up.

I am telling you my Alibre (Alibre Expert 2011 x86 and x64) have *.3dm import. I did not install any add-on, the Alibre Rhino add-on will not install to AD 2011 and I have not installed Sycode for a 3dm plugin (I actually wasn't aware they had one.)

All Add-ons listed in my add-on library:
x86
Alibre Motion
Alibre Part Library
Alibre Translate
Keyshot
TraceParts Library
SYCODE DWG Export (trial)

x64
Alibre Translate
Keyshot
TraceParts Library

I think the wheel problem was sloppy work on my part combined with unfamiliarity of new programs.

If you lookup "About Importing Files" in the help file you will see *.3dm as one of the core file import filters.

Straight from the help file;

>Supported file types
>Part
>>Alibre Design files (*.stp)

>>SolidWorks part files (*.sldprt)

>>All STEP files (*.stp, *.step, *.ste)

>>SAT files (ACIS) (*.sat)

>>IGES files (*.igs)

>>Rhino files (*.3dm)

>>* AutoDesk Inventor (*.ipt)

>>* Pro/E (*.prt, *.xpr)

>>* SolidEdge (*.par, *.psm)

>>* Catia (*.CATPart)

>>* Parasolid

>* - Available with purchase of Alibre Translate add-on.

I don't know what to tell you... Maybe I got a special edition? Alibre is always adding/removing "bonus" features.