Okay, apologies in advance if this is simple info or found elsewhere, as my google fu and practical experimentation has not yielded any results thus far.

I made a replacement package for Sims 3, to sacrifice the scruffy chinstrap beard (the one next to the full goatee) in exchange for a goatee without a moustache -- just chin fuzz. (Thanks to the tutorial-makers here!)

That's all well and good, and it looks and works perfectly in-game, except that the thumbnail under hair-->beards in CAS still shows the old chinstrap beard and not the chinfuzz goatee. It works fine when you click on it, but I can't figure out how to force CAS to generate a new thumbnail for it.

I've tried deleting CASPartCache, compositorCache, and simCompositorCache packages. I even went so far as to delete the /thumbnails/CASThumbnails.package. But even when it has to regenerate all the thumbnails and such, it doesn't show the new beard in the thumbnail.

Is there a simple solution to this that I've missed, or something I can do to remedy it?

(also, does anyone want my chin-fuzz goatee?)