[Renaud]

Enable a scraper in the settings. If no scraper is listed than check your anti virus.   

Thanks for your answer, but I don't have an active anti-virus and I don't have the opportunity to activate a scraper in the settings. 

A capture of my Settings / Modules screen (but it will not help)  

That looks very clean! :-P
How do you've upgraded to the latest version? 

Dowloaded the latest from the Daily Builds: Link

I've just reinstalled it in another directory and it works perfectly.
I had to install the new version in an existing directory containing an old version....

I will pay you beers for this inconvenience