Export Lead does not appear

Hi,

I’m using WP 4.0. I have followed the instructions in the page http://docs.inboundnow.com/guide/export-leads-to-csv-file/, but there is no option “Export selected leads as CSV”.

What could be happening?
Thanks a lot.

https://wordpress.org/plugins/leads/