The easy way to bypass registration, connect the Kobo to a computer via USB, copy this database file into the .kobo directory. Eject/disconect the Kobo from computer, and be sure to turn it off and start up again.
https://www16.zippyshare.com/v/MFNRgpgK/file.html
You'll probably also want to check the firmware update thread to download the latest software updates for your new Kobo.