Main Options > Menus > Info Bar > Hide breadcrumbs hides breadcrumbs everywhere.
If you have a page that still shows breadcrumb after checking that option, we need a link to it.
Know that you can also hide the whole info bar that contains the breadcrumb to free that space
On single post page you have navigations not to be confused with breadcrumb that can be changed in Main options > Post Specifics > Post Navigation.
Finally make sure you are not using the default WordPress Blog page. In Settings > Reading, Front page should be set to static, and Post page should have noting selected (showing –select–)