Admin Limit to add listing manually

I;m using Responsive/DirectoryPress Ver. 6.3

As ADMIN, I’m posting Listings manually, but after my first 10 listings it show that I have reach my limit for posting more listings, if i want to post more, i have to delete previous listings.

How can i add more listing manually as admin, or is there a LIMIT?

Thank You, So happy with this theme,
my website: https://www.magical15.com
(spanish)