Welcome to the new forum
I download a lot of songs on Amazon. There's no need to use the downloader... I just click on [Buy] and I get the mp3 file directly.
click on "Your Account" in top right corner. There will be a section called "Digital Content" and you can redownload the MP3s you've purchased there.
must be your settings, or maybe you should uninstall the downloader thing. when I browse tunes, I get this icon under the Dowload column: ; if I click it I get the mp3 file directly