Hi, thanks for your answer.
I wanted to use v4.2 so I flashed my device.
So after erasing it I flashed it with SAM-BA but I don't remember if it was successfull. But I think so because I tried to use VB.net after flashing. (thats about 2 or 3 months ago)
The device is listed as "Netduino Plus", and when you right-click and go to settings you have "Code 28 - No driver installed" ...
EDIT: Section: Other devices
EDIT 2: I also installed .net micro framework 4.2, but in both situation the drivers do not work / can't be used for N+ device