Site in question is here: http://www.dreamdinertyngsboro.com
I looked at it on Monday and it was fine. No one touched it except the WordPress to Dropbox Backup plugin the following day. Today, I see that there are 404 errors on every page. It looks like the site isn't talking to the database properly. The posts are intact in the database. I haven't a clue how to fix this yet.
I have changed the permalinks to default and then back again to no avail.
Also, I have the latest WPB2D backup, but I can't find where it stores the database.