Options for search – want default to “all” not “here”

I have a page with Advanced File Mgr, with shortcodes, displaying a set of directories and files. When using the search box, the default is “here”. I want to change this to be “all” as a default. How can I do this? I want the user to be able to easily search for criteria in all files or directory names, not just the ones currently showing – without the user having to change the option themselves (as they likely won’t know how to do this). I don’t see how to do this in the shortcode documentation.

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