Forum:What's up with my WillowTree?

I want to try my hand at some minor weapon mods. Nothing too crazy or game-changing. But WillowTree won't allow me access my Weapons file. The list looks something like this:

-(open folder)Save0001.sav

+(closed folder) Character

+(closed folder) Skills

+(closed folder) Ammo Pools

(closed folder) Grenades, Shields and Mods

(closed folder) Weapons

etc, etc.

(Sorry, trouble copy/pasting the window.)

Note that the Grenades, Weapons, and all subsequent folders have no (+) dropdown button. ????? I can't access those folders.

Any help would be appreciated.