*Facepalm* Been working without it, since it didn't seem to do anything when I first started. I've added it now and it fixed my lack of image, but things are still a little wonky on the back end. I'm trying to import the images I've already uploaded, but I'm suddenly getting either a blank Lightbox or an error about trackback (I'll post it the next time I see the error, if you'd like).
The blank Lightbox window seems to stem from attempting to import large numbers of files. It seems some of the files are imported, but not all of them (perhaps if given enough time?).
The error has been happening with a different album, regardless of the number of images I attempt to import. Uploading from computer seems to work fine, it's just the import part that isn't working.
**Edit -- for some reason, using the import from another folder option will only import 7 images at once, and anything more than 5 will give the blank Lightbox. Also, deleting a re-creating a page with the same name will break the Files and Assets view until you delete one of the duplicate folders.