Any folder that I have made in the last two months, as far as I can tell, is not opening up on the list.

So older folders in the Libraries still work, but not the newer ones? That is odd.

Have you tried making new folders after installing Pro Pack? Do the new ones show up in the Library? If so, you could just transfer the contents of the old ones.

I guess I'll ask this before Ron does: have you installed the latest Service Release Update (#3) for Pro Pack? It's available at Curious Labs.