FileFinder requires the full filePath.

src/atom/root-view.coffee

@@ -39,7 +39,6 @@ class RootView extends Template
       else
         directory = fs.directory @editor.buffer.url
         urls = (url for url in fs.list(directory, true) when fs.isFile url)
-        urls = (url.replace(directory, "") for url in urls)
         @fileFinder = FileFinder.build({urls})
         @addPane(@fileFinder)
         @fileFinder.input.focus()