Add a Sketch to the library. How do u do it?

[Eawo]

This is driving my crazy i tried adding the slim humidity and bat sketch. To the mysensors library. This problem is new then i reinstalled arduino and also updated to 1.8.
I have downloaded and inside arduino i added zip file. Im available to use all the original sketches. But now i want to add a sketch from someone on the forum it wont work it just say can not find file and give me a the path to where i stored the file.

What Im i doing wrong?
It work just fine on my old computer with arduino 1.6.7