I've used Projectivy for years on every Google TV stick I own (Google/Onn). Works perfectly with full customization/zero ads on the free version and has a workaround to take over the Home navigation to bypass the built-in launcher without ADB or rooting. I chip in for the premium version to help out the dev since I get so much value out of it but the freemium features are mostly just cosmetic and the free version has everything you need.