Question [Q] help with s4 google edition

hey, i recently got a samsung galaxy s4 which i had rooted and had flashed the google edition rom which came with a basic version of nova launcher. but to install the prime version of the nova lanucher using an apk file.. it doesnt happen as the basic version is still available. i was just wondering if there is any way to do that. i anyway use another launcher called the next lanucher. but i was just wondering if installing that nova prime through the apk is a possibility, or is it possible to uninstall the default nova launcher that it came with, as in remove it from the phone totally,