For what it's worth, I've cleaned my Toolbar/Animation dialog entries.
**DISCLAIMER**
If you wish to try this, you do so at your own risk.
It worked for me, but I'll not be responsible for any mishaps on your part.
I went through all my WB skins folder, and found files that didn't need to be there. Skins that had no toolbar icons, would have files named something like subskin.ToolbarIcons, or Luna.ToolbarIcons, and even nameofskin.Subskin.ToolbarIcons. (some folders had more than one) You get the idea. The point is, there shouldn't be any .ToolbarIcons files in these folders.  
The same thing goes for animations.
I simply send them to the recycle bin. My Toolbar Icons/Animations list in WB config is correct, and free of clutter.

**DISCLAIMER**
If you wish to try this, you do so at your own risk.
It worked for me, but I'll not be responsible for any mishaps on your part.