Yes and no. The current system we use does not allow us to manually restart people, and, unfortunately, the same email address cannot receive the lessons more than once.
Therefore, to start over you would need to use a new email address and sign up again here for free: http://www.the-course-in-miracles.com/free
GMAIL USERS: If you use gmail, there is a super-easy way to do this. You can create an "on-demand" email address. For example, if your email address is jennysmith1000@gmail.com you can add a + and a word just before the @ sign like this: jennysmith1000+acimlessons@gmail.com Gmail knows to automatically forward jennysmith1000+acimlessons@gmail.com to jennysmith1000@gmail.com without you having to set anything up. It just happens easily and automatically.