Hi Frank,
What version of the Cart are you running?
Are you referring to the "Continue Shopping" button on the Cart page the Product Detail page or the Confirmation (After Payment) page?
If you are referring to the Confirmation (After Payment) page, in the most recent versions in the Cart Settings under the section"Confirmation Status Page Setup (After Payment)" you can add a "Success Redirect URL" Enter the full URL that you would like to redirect the user to after successful purchase.
Thanks