If you are in Premiere Elements and you select Add Media/From Flip and Cameras, the Video Importer will lunch -- and in it you can preview your video clips, check the ones you want to download and uncheck the ones you don't.
But if your video is in the form of clips on an exertnal drive, you should use Add Media/From Files and Folders and browse to the file or files you want to import.
Use Premiere Elements to add specific files. Not the Organizer.