Ok,,, an embrasinly simple question, but one that I cannot workout!!

I have category dressing installed (1.3.9b).. all is great but I cannot for the life of me work out one tiny thing..

I want my top level categories to have the bullet and for that bullet to change when a top -level category is open to display the sub categories. As is when this mod is first installed. But I dont want sub-level categories to have any bullets at all! And I cannot work it out...

I either have all bullets or no bullets....

someone please help, im properly stuck!