Add CPT Dropdown on header section search?

Hi,

I have purchased the Premium version for this but I only have a very simple question but I just can’t seem to find the setting needed for this to show up.

I would like to replicate how the search functionality on this demo is configured.

https://wpgeo.directory/supreme-directory/

I just need to add the CPT dropdown beside “Search for” on the header section but I can’t find it on the settings page for GD.

Again, I’m using the PRO version. Can anyone point me to the right direction please?

Thanks!