You may see that the Support Manager, Knowledge base & Downloads doesn't have a page title. We know how annoying this is and we've had to do this fix for ourselves.
Open: /plugins/support_manager/controllers/client_tickets.php
find: $this->structure->setView(null, $this->orig_structure_view);
below it add: $this->structure->set("page_title", "Support");
Open: /plugins/support_manager/controllers/knowledgebase.php
find: $this->structure->setView(null, $this->orig_structure_view);
below it add: $this->structure->set("page_title", "Knowledge base");
Open: /plugins/download_manager/controllers/client_main.php
find: $this->structure->setView(null, $this->orig_structure_view);
below it add: $this->structure->set("page_title", "Downloads");
You can use any text you wish like instead of Support use Tickets for the client_tickets.php
file.