Why it's needed: UGH and Piper's World aren't in the Play Store, so your device has to be told it's OK to install them from a file. These steps unlock that — safely and reversibly.
Settings ▸ System ▸ About → scroll to “Android TV OS build” and click it 7 times. You'll see “You are now a developer.”
Settings ▸ My Fire TV ▸ About → highlight the device name / serial and click 7 times.
This lets your device install apps from a file instead of only the store. Turn it on for the app that does the installing (your browser or Downloader).
Settings ▸ Apps ▸ Security & restrictions ▸ Unknown sources → toggle ON for Downloader.
Settings ▸ My Fire TV ▸ Developer options ▸ Install unknown apps → turn ON for the browser/Downloader.
Google TV ships with no web browser at all — that's normal, not a mistake. Install one from the Play Store (search on your device). Best pick for a remote:
Open Downloader and type ughosting.net/csetup → Go. A short code shows on the TV — have UGH Support approve it, and your downloads unlock. Tap UGH; when the .apk finishes, open it and choose Install.
Install Piper's World from that same ughosting.net/csetup screen. When done, open UGH and enter your login once — your device is ready to watch.
⚠️ Heads-up: only install from links you trust. “Unknown sources” turns off your device's safety check, so a bad file could install too. Turn the toggle back off after you're done if you want it locked down.