Remember when getting your new box that you must let the box finish loading after install. It takes about 15 minutes. Do NOT unplug the power.
If your box froze it most likely mean that you unplug the power or you tried to navigate the box while it was loading. If this happens not a problem simply unplug the power on the back of the box. Let it sit for 30 seconds and then replug back in the power and it will refresh Kodi and fix the freeze.