Cannot set a page to „section“

Dear Team,
I have the wordpress-template „brooklyn“ for 5 years now. I updated my site „urneo.com“ with the latest version and now my scrollable one-page site transformed into single pages.
I cannot find the option to set pages to „sections“ and define that in the menue.
I also cannot find an alternative way to build a one-page-site with a working menue.

Any help ist appreciated.
Kind regards,
Martin

Hi,

Contact with your purchase item author @UnitedThemes right here as a comments

Hope they will helepd!

Thanks!