Media Library File URL

I started a WP site with “Organize my uploads into month- and year-based folders” checked. I needed to change that to all files in /wp-content/uploads/, so I moved the files, and used a search and replace to delete the year/month portions of the path in the database. However, I notice that when selecting a file to edit (“media edit”) that its “File URL” field still retains the year/month subfolders, i.e. “…/wp-content/uploads/2010/02/…”. The database doesn’t return any result when searching for this. So: Where is the File URL information retained?