PowerArchiver2010... from the manual....
* "Add" - adds all specified files to the archive.
* "Update" - similar to Freshen, but it also adds any specified files that are not already in the archive.
* "Freshen" - updates files already in the archive that have the same names as files being added.
* "Move" - works similar to Add, except those files are actually deleted from the disk after they are added.