Bind Windows Key in Enlightenment

so I set up Arch with Enlightenment. You open the "Run Everything" application using alt+esc by default. I'd like to use the Windows Key for that. The key bindings manager only allows for key pairs. Like modifier + key... so I can't do it in the key bindings manager. [At least, I think I can't]. So, how can I run "Run Everything" using the Windows Key only?