To delete a lightroom catalog, open Lightroom with the Catalog you want to delete. Then select “Catalog Settings.”
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The “General” tab of the pop-up window displays the disk and folder containing the Catalog. Now, close Lightroom.
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Deleting the Catalog will remove all information that has not been stored in or with the image files themselves, so double-check that you want to delete this information. Browse to the folder containing the catalog
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Drag the folder together with the subfolders and files to the recycle bin
