Let me think about this for a little while, and I’ll get back to you.
If you’d like a minor suggestion, as an optional feature that can be turned off, you might want to consider putting keyboard shortcut hints in a small rectangular region right below the search bar to help the new user to learn how to use Listary more effectively. This would obviously just be a convenience feature until the user could learn the shortcuts, and then they could disable the hints. Such a feature might be especially helpful when using File Open dialog boxes. Or perhaps hints would appear only if the Alt key were pressed, or something like that.
Another suggestion is that upon initial installation and configuration, Listary should check to see if a custom file manager is installed in the usual path, and if so, automatically configure it as the default file manager, rather than requiring the user to type in the path and “%1” parameter.
You might want to add another default filter:
That way, users can search for an .exe by typing, for example:
Let me think about a more substantive answer and I’ll post again soon.