Select your vehicle (ensure you can see your trips, if you have trips). 
Click "Preferences" tab
Click "System Email" button
Enter you password to change your email. 

Enter new email address or edit existing email. 

If you have forgotten the password, click on the forgot button and answer those security questions to get your password. 
If you have forgotten all three questions, please let us (support@littlelogbook.co.za) know so that we can help recover it.