Hi there! I see you'd like to download the B1G+ app onto your TCL smart TV. Could you please let me know if your TCL TV is running Android TV, Google TV, Roku TV, or another platform? This detail helps me guide you accurately.

In the meantime, here's what I can share:

1. B1G+ is available on several devices, but the app is not officially supported on TCL smart TV browsers.
2. If your TCL TV uses Android TV or Google TV, you can try downloading apps through the Google Play Store accessible on the TV.
3. However, some users have reported the B1G+ app doesn't show up or install directly on TCL Google TVs, and side-loading might be possible but tricky since the app is designed for touch input, not remote controls.

To start, if your TCL TV is Android-based:
- Press the Home button on your TCL remote to get to the Android TV home screen.
- Navigate to Apps > Get more apps (or open Google Play Store).
- Search for "B1G+" and see if it appears for installation.

If it’s not available:
- You could try side-loading the app via USB, but you'd likely need a mouse or touch emulator app to navigate inside it.
- Alternatively, you might consider using an external streaming device like Roku, Fire TV, Chromecast, or Apple TV where B1G+ is officially supported for smoother experience.

If your TCL TV is Roku-based, you would install it through the Roku Channel Store, but checking if B1G+ is supported there is important.

Could you confirm your TCL TV model or platform? This way, I can give you the best step-by-step instructions or alternative recommendations!