If you installer created one scenario through Home + Project, you can launch and manage it through Home + Control but you cannot modify it. You can create new scenarios or scheduled actions or smart notification or automations directly in Home + Control
Beside the 50 scenarios that your installer can create in Home + Project and you can launch from Home + Control, you can create directly in Home + Control: 50 scenarios, 10 schedules of actions, 20 smart notifications and 20 automations.