I'm sorry if I came across as snippy, that was not my intention, I'm just used to the distinction between deleting an app, and uninstalling it.
Anyways, after removing all traces of Quicksilver from my computer (twice), reinstalling Quicksilver, and adding the Dropbox folder to my catalog twice (I normally set scan depth to about 5), I was still having no luck, however, after removing the file and folder scanner for my Dropbox again, and rescanning the catalog, the files and folders have appeared again. Thank you for your assistance.
