Portableapps categories problem

Hi to all, im new to this but have been using the Portableapps menu for a long time now, its very very good but I have a question, you see, I saw that it is possible to make categories folders and put things inside those categories, I mean put programs that are similiar inside those categories, the problem is that the little icon of the folfer is not displayed, just have a picture that says ico and nothing else, is there a way I can make it work??

Thanks in advance