Qt Creator editor - can not activate Cython syntax highlight

[Ivan Nazarenko]

In current Qt Creator I could not set Cython (extensions="*.pyx") highlight even after:

1 - Tools -> Options -> Text Editor -> Generic highlighter, setting the folder there to one with the two files:
cython-numpy-mode-kate.xml
yaml.xml

For yaml the syntax highlight started working here. But *.pyx cython files still were highlighted as "python".

2 - In Tools -> Options -> Environment -> MIME Types, I dissociated *.pyx files from anything. It was previously associated with python.

And the editor still highlights just as python. Kate, for instance, highlights correctly, so the xml seems correct.

Is there a way to enable Cython highlighting in Qt Creator?

(note: the above xml for cython is trivial to google from its own file name)