In Sakai 11, the ‘More Sites’ tab has been replaced with the ‘Sites’ menu (located upper right). The following article explains how to manage which sites appear along the top and within the ‘Sites' menu and how to remove sites from view completely: https://www.stlawu.edu/it/node/31109/
On Tuesday, July 11th the upgrade to Sakai 11 was completed. All course and project sites are available. Site navigation, tools, and operations have not changed significantly and users should be able to find their way around. If you have any difficulty and need assistance (or just have questions), please contact one of the Educational Technologies staff via the IT HelpDesk (315-229-5770 or firstname.lastname@example.org).