Hello Rolf,
I have imported the project into my KDS 3.0.0 (PEx for Kinetis 3.0.1) installation and I was able to reproduce one warning that is caused by the ADC component (AD1.c and AD1.h source code files). The AD1.h source code file contains the following incorrect declaration:
static void AD1_MainMeasure(void);
I.e. It is static function that shall be defined in the AD1.c file only.
I will report this issue to the PEx development team. But there are not any other related warning reported by the compiler.
You can modify the AD1.h file (remove the declaration of the AD1_MainMeasure() function) and set the option Don't Write Generated Component Modules, see the following screenshot:

This option ensures that the AD1.h file (and also the AD1.c file) will not be overwritten by Processor Expert.
Best Regards,
Marek Neuzil