First of all, thank you for your work with the launcher.
I have a Nexus 5 with Android 5.0.1. I downloaded you APK and signed it using ZipSigner with the "platform" option, but i still only get "The app has not been installed". What am I doing wrong?
after signing the .apk you need to create a folder system/app/LeanbackMod and copy and paste the .apk there