To delete episodes one at a time:
Go to My Library --> Downloads
Swipe right-to-left on the episode you wish to download
Tap "Remove" to confirm deletion
To bulk delete all episodes you've downloaded:
On the home screen of the app, tap on the Settings icon (the gear in the upper-right corner of the screen)
Under the "Storage" section, tap the "x" button
Tap "Confirm" to confirm deletion of all downloaded episodes
From the Settings page, you can also opt to automatically delete downloaded episodes after you play them.
If you run into any issues or have questions, please contact us here and we'll dive deeper into what's going on.