I have this file I want to compress as specifically a .bz2 file. I see that Directory Opus supports this file type natively and is able to open it, but I would like to compress files to that file type. How can I add .bz2 to this dropdown, or other archive types for that matter?
Thanks
You can make a .tbz2 archive but we don't support read-write single-file compression like bz2 on its own. We can read/decompress those, but not create them.
(Ensuring only one file was selected and blocking the operation otherwise would be too complex to retrofit when everything was designed around multi-file archive formats.)
If you want to do that from Opus, the best way is to create a button (or menu, hotkey, etc.) which calls 7zFM.exe or a similar tool to do it. Aside from the way the progress dialog looks, it should integrate similarly to the standard archive functionality.