If you want to keep only files that were loaded or parsed during the last Project download, add the following parameter in the URL field below the starting URL (on a separate line). Such as:

http://www.metaproducts.com/

Additional=DeleteOldFiles

This feature is useful when you want to get rid of files that are no longer linked to downloaded pages.

Please use this feature carefully. If you change Project settings to narrow Project download, some files loaded before might be lost, because Portable Offline Browser considers such files unused.