1. Go to your account console, and click "EDIT" on the Shell you'll like to do the changes to.
2. Next page, click "REINSTALL"
3. Select the reinstall settings you'll like
4. You'll get a code via your email for Validation.
5. Once validated, your Shell will reconfigure and be ready to launch! Make sure your status of the Shell is displayed as: "running" It takes a few minutes but if it's taking unusually long, just click the play button to start it. <Play button is available in the advanced mode which you can switch to by clicking the "advanced mode" button found on the left panel of your console>
And that's it! Your Shell will now run the new OS