Do not download any file until you check your current version. Installing the wrong firmware can brick your projector.
Only update if you are experiencing specific issues, such as the projector not recognizing certain video formats or freezing during playback. If your UC40 is working fine, the risks of a manual firmware flash often outweigh the minor benefits. Unic Uc40 Projector Software Update Download
What is your (found in Settings > About)? Do not download any file until you check
Unic UC40 Projector - $100 - [Unboxing & Review] - 800 Lumens - 130 Unic Uc40 Projector Software Update Download