I found the solution.
I copied all the libraries directly to the libraries folder of the Arduino IDE
now it works!

Yes I did!

No, I added them! Under Examples I can see the library.
But theres something wrong with the include of the Bounce2.h, Sensor.h and RF24.h. They dont change to orange like EEPROM.h and SPI.h does.
Its the same problem in every example sketch

When I want to compile the sketch so send sensor data to my RPi i get this error:
BinarySwitchSensor:14: error: 'Bounce' does not name a type
BinarySwitchSensor.ino: In function 'void setup()':
BinarySwitchSensor:27: error: 'debouncer' was not declared in this scope
BinarySwitchSensor.ino: In function 'void loop()':
BinarySwitchSensor:40: error: 'debouncer' was not declared in this scope
What can i do?