This article will explain to you how to change the feed format on the Effortless Feed app
To export the feed using Effortless Feed, select a feed format that is compatible with the platform you want to export the feed to
Another option is changing the format manually: copy the URL and change the ending from csv to tsv or xml.
Example:
https://apps.adcore.com<key>&format=csv
to
https://apps.adcore.com<key>&format=xml