We have changed the email address on our account . Unfortunately our satnav still wants to use the old email address and we cannot see anywhere on the device to change it. In order to log into Mydrive on our device we need to be able to change the email address to match the one on my account. Of course it keeps telling me that the email address is old and that it cannot log me in. How do I update it on my device to match the correct email address for my account.