I unzipped the file under windows file-manager and not in the terminal-application-window.
Yes, if I recall it right, I unzipped the image-files to the platform-tools folder.
I just took care, that I was working in the directory, where the files were located (so I did not need to add a path).
I keep my fingers crossed. And if the files should not be found, I guess this can do no harm.