Go to the Catalogs page in plugin admin area to find all of your catalogs.
Here you will see an overview of all your catalogs, including the title, ID and associated shortcode for each. If you have many catalogs, the list may be broken up into multiple pages.
You can sort the catalogs by title or date simply by clicking the column heading. You can also search for a catalog or filter the catalogs using the date dropdown field.
To edit a catalog, just click on its title. To create a new catalog, click the Add New button at the top.