Nokia :: Delete All My Favorites In One Step?

I have imported from Google Earth, thousands of POIs in Food categories for entire Brazil country, very ease: simply I get the KML file and converted it with Gps Babel to Nokia places format,click the file in the File manger, it asks which I want import, them I selected ALL, that works fine. But it put these POIs in my Favorites instead of General POIs, and did not included the subcategories of the Type of Food (Like Chinese, Pizza, French, Barbecue etc.). Not satisfied, because this and because it turned very slow, I want delete ALL these Favorites, but the only way I found to do this, is one BY ONE, I not found a way to delete ALL Favorites in one path only. In summary, my question is: What is the procedure to delete ALL my Favorites together?