How do you sync data from the device if it wasn't registered initially?

Do you have an account with the central Hub (hub.learningequality.org)? If not, then you probably chose to do the one-click register option.

If you chose to one-click register, you will be unable to register with online access to data later. If you chose this option by accident and would like to start over, navigate to the folder KA Lite is installed and re-run the setup command. This means having a completely new set up, so make sure to use the ‘Export Data’ feature to grab your usage data before doing the re-setup.