Hi Erich,
Thanks for your reaction. After playing around with the right settings a lot more I found a setting that will do the trick.
Windows -> Preferences
and then
MCUXpresso -> SDK Options
There you can disable "hide middleware options ....".
By doing so it will enable or disable the middleware options when creating a new project.
I don'n know which xml file you mean but it seems the middleware is there as options when creating a new project. Until now I didn't test the middleware itself. Or is this the wrong way to do?
Regards,
Wilco