The April 2018 update has been rolling out in waves. If you still did not receive the update, you can manually download Windows 10 April 2018 update ISO file from Microsoft. Here’s how to download Windows 10 ISO from Microsoft.
When you try to close Edge with multiple tabs, it is will display “Do you want to close all tabs?” prompt that gives you a chance to review the opened tabs. Have you disabled close all tabs confirmation window in Edge and don’t know how to re-enable it? Here’s how to enable “Do you want to close all tabs?” prompt in Edge.