Click on the menu icon in Chrome and select Settings.

Click on tools / extensions. You will see all the extensions that you have installed on your browser. Select the KidStart Savings Prompt from the list.

Unticking 'Enable' will disable the Savings Prompt, allowing you to easily enable it again at some point in the future.

Clicking the trash icon will completely remove the Savings Prompt. If you would like to reinstall it, you will need to do so from here.