Please check this Agreement and any guidelines notified to you by Pango periodically for changes. In the event that a change to this Agreement materially modifies your rights or obligations, we will make reasonable efforts to notify you at least 30 days in advance of the effective date of such change. We may provide notice through a pop-up or banner within the Service, by sending an email to any address you may have used to pay for the Betternet Software Paid Service, or through other reasonable means.