The "Xfinity X1 Remote" app has stopped working. You need to go to the Play Store and install the "Xfinity TV Remote".
After signing in, you will see a microphone icon. Click that icon to see menu tabs for the arrow keypad, FF, PLAY/PAUSE,RW and Number Keypad. To me, that was not intuitive to locate those, so hope to save someone the frustration I was having. As you have probably discovered, the LeapDroid Android emulator for Windows PC is no longer available. I found another Windows Android emulator called AMIDuOS at <http://www.amiduos.com/>. It works, but it only fullscreen not a window like LeapDroid. Also with the Xfinity TV Remote, when you click the microphone icon, the screen rotates to vertical orientation but everything appears so small it is difficult to see. Not sure if the problem is with AMIDuOS or the Xfinity app. Another option I got to work is using an Android app called Mobizen at < https://www.mobizen.com/>. This enables you to mirror and control an Android device on a Windows PC. Hope that helps!

