let’s try again with the image..
The v8 theme is the one currently active. The version 9 is the theme to the far top right. When you hover over the thumbnail you’ll see the Activate button.
Note: The v8 templates and designs will not automatically work with v9. It’s a different framework.
I’d also recommend making a backup of your database before activating v9.
and how do i update MySQL?
Your web host provider would be the one to help you out with server software.