When using Easy Digital Downloads to sell your digital products, each category page has a URL that looks like the following:
Note the category in the URL above. This is the default label that Easy Digital Downloads uses for categories. To change it, simply add the following to your child theme’s functions.php or plugin and modify accordingly.
Finally, it’s a good idea to visit the Permalinks admin page to flush the cache. Simply visit Settings → Permalinks in the WordPress admin to flush the rewrite rules.