By default, it's set to 'Never', you don't want that. The option 'Always' securely wipes all temporarily extracted files, while the option 'Encrypted only' wipes temporarily extracted files only if they belong to an encrypted archive.
By default, it's set to 'Never', you don't want that. The option 'Always' securely wipes all temporarily extracted files, while the option 'Encrypted only' wipes temporarily extracted files only if they belong to an encrypted archive.