Then downloaded the libraries from:
https://www.tinymce.com/download/ (developer edition, community doesn't even have a non minified imce.js file...)
Now the file structure is not the same as the instructions from Drupal Backend:
Extract the archive and copy its contents into a new folder in the following location: sites/all/libraries/tinymce So the actual library can be found at: sites/all/libraries/tinymce/jscripts/tiny_mce/tiny_mce.js
So I deducted I had to change folder structure from:
But still not working, I get this error:
TinyMCE (Download) Not installed. The version of TinyMCE could not be detected.