I installed KSDK 1.2.0, KDS 3.0.0, PE 10.4 and JLink V500, installed the KSDK a second time in KDS via help/install (because the
"installation program" is only a self-extracting archive) and then a third time the same way and now it can't be installed a fourth time because it is already installed:

So now it is fully installed.
I also set the environment variable KSDK_PATH, but i still don't have a KSDK when i start a new Kinetis project for a processor (MK60DN256ZVLL10):


This results in strange errors like my code in the loop in main.c gets deleted and when i am using PE, and many components are shown but not availible, e. g. for gpio1:fsl_gpio i get the error "is not installed in this version of ProcessorExpert".
And without PE i can use no component, so i can use nothing; even LED blinking is not possible!
How can i start a new project with KSDK?