These two features are paired up because Restore does not work properly unless Extract has been run first. If you're not aware of what copier headers are, please take a look at No-Intro or something similar that uses these extensively. The basic premise is that there's additional data somewhere in the file that is not part of the original game data and these headers can be added or removed without harming that data.

Please see Copier Headers for more information about supported formats.

Flags: -ex, --extract

This will detect, store, and remove copier headers from a file or folder of files. The headers are backed up and collated by the hash of the unheadered file. Files are then output without the detected copier header alongside the originals with the suffix .new. No input files are altered in the process. Only uncompressed files will be processed.

Remove all headers from a headered set and store them in an "unheadered" folder

--extract --output-dir=path\to\unheadered path\to\headered

Flags: -re, --restore

This will make use of stored copier headers and reapply them to files if they match the included hash. More than one header can be applied to a file, so they will be output to new files, suffixed with .newX, where X is a number. No input files are altered in the process. Only uncompressed files will be processed.

Restore extracted headers from a headered set and store the result in the headered folder

--restore --output-dir=path\to\headered path\to\unheadered