When in doubt, leave the box on its current firmware. An outdated but working box is far better than a bricked one.
If your Android TV box is stuck on the boot logo, apps keep crashing, or the system feels sluggish, a firmware reflash (also called a "ROM update" or "stock firmware restore") can often bring it back to life. While many websites offer “free downloads,” navigating this space requires caution. android tv box firmware free download