How can I delete from the furniture catalog?

[HatiDani]

Hi!
I imported accidentally some bad objects into the furniture catalog.
How can I delete files, folders, from the furniture catalog? (no longer need)

Thanks!

[Puybaret]

Select the item you want to remove in the catalog, and click on the delete icon.
Empty categories are automatically removed.

[HatiDani]

Thank you!
But in some models the Delete button does not appear! What can I do with them? (Ver.:4.3)