It is not possible to transfer information (such as questionnaires, reports, or mailing lists) between accounts.
For this reason when you are upgrading be sure to use the email id that you used to first open your account. DO NOT use any other emails. If you want to change the email associated to your account this can be done in your account settings it should not be done when upgrading or signing in.
You are responsible for remembering your email id and password. We cannot retrieve this information for you. If you have forgotten your password see this FAQ.