I have installed the most recent development veersion (0.9.0), however even in the current stable release the Exclude Files/Folders options doesn't work. I need to exclude some of the folders in my uploads wp-content folder because there are cache files that don't need to be backed up and some other pretty static files that already have archives backed up. I'm have the option of "Blog Content" checked. I'm not sure if your Exclude option only applies to Include Folders. I will try this but I would consider either making that clear or giving the option of taking the Excludes into account even for the checkbox options of what to backup.