Attached Link: http://www.senosoft.com/

Sad to say, and very unhelpful it is too, but the only advice really is not to get into this mess in the first place. :) Trying to find something that you don't know the name of in 130,000 files is, to all intents and purposes, impossible.

I've spent worrying amounts of time organising my libraries, but I still can't find everything when I need it. I sometimes have to go back to the download site (assuming I can remember where I got the thing, and that the site is still there) to find the name of the zip, then search for that on my disk, and finally find out the library name. Worse than that, maybe, is when I don't even remember having a thing, and go around searching the net only to re-download something I already had.

I'm beginning to think that having an enormous library is counter-productive.

Having said that, I second pakled's recommendation for P3dO Explorer. You can see much more of what's in each library category at once, so if you're a visual browser, you stand more chance of finding whatever it may be.