To renew your marketplace token, go to Channels and click RENEW TOKEN on the sales channel you want to renew.
A window will pop up, prompting you to sign into your store account. Provide your credentials to login. That way you are authorizing ExportYourStore and re-granting us access to your store.
Note: If you have multiple stores/accounts on the platform you're renewing, make sure you are logged into the correct one on the pop-up window.