Now that you've downloaded a Crate, here's how to get the music from your Crate into another program:
When you download a Crate, the MP3s download to your device in a zip file.

Click on that folder to open the zip file, and you'll see all of the MP3 files inside.

Highlight those files and drag them into a new folder on your device.

From there, you'll be able to drag the files into another program.
