The main navigation links are not shown

I just updated a site with the Flexi Store template to V8.0.2, but the top navigation links configured in the previous version have disappeared. The Top Navigation Links section in the template options shows the links I need, but the links are not shown on the live site.

I also tried a different template and then went back to the Flexi Store template, but the problem still exists.

Any suggestions to solve the problem.