I installed these modules: Wysiwyg, IMCE Wysiwyg bridge, IMCE.
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:
sites/all/libraries/tinymce/js/tinymce/tinymce.js
To:
sites/all/libraries/tinymce/jscripts/tiny_mce/tiny_mce.js
But still not working, I get this error:
TinyMCE (Download) Not installed.
The version of TinyMCE could not be detected.