To change your podcast cover art for an episode:
- Choose the relevant show from My Shows
- Click Episodes on the left side menu
- Find the episode you want to change
- Click edit
- Click the large podcast cover image under Episode Settings
- Find the replacement image you want to use
- Click Open
- An Upload Profile Picture window will appear
- Adjust the image to suit
- Click Save Picture
Note: Some podcast apps (like Apple Podcasts) don't support individual episode art, and will pull the default show artwork instead.