Hi! I understand you're having trouble because the Tubi app keeps closing right after you open it on your Windows 10 device. Let's work together to get this sorted out.

To start, could you tell me if you are using the Tubi app downloaded from the Microsoft Store or watching through a web browser? Also, have you noticed if it crashes immediately or after trying to play a video?

Meanwhile, here are some steps we can try to fix the crashing issue:

1. Restart your computer: Sometimes a simple restart can clear out temporary glitches.

2. Update Windows: Make sure your Windows 10 is up to date. To check, go to Settings > Update & Security > Windows Update and click Check for updates.

3. Update the Tubi app: If you're using the Microsoft Store app, open the Store, go to Downloads and updates, and update Tubi if available.

4. Clear app cache and data: On Windows apps, clearing cache isn’t as straightforward as on mobile, but uninstalling and reinstalling the app effectively resets this. Try uninstalling the Tubi app:
- Press Start, type Apps & features, open it.
- Find Tubi, click it, then select Uninstall.
- After uninstall, restart your PC and reinstall Tubi from the Microsoft Store.

5. Check your internet connection: A poor connection can cause apps to crash or behave oddly. Please ensure your connection is stable.

6. Try running Tubi in compatibility mode: Right-click the Tubi app icon, select Properties > Compatibility, then check Run this program in compatibility mode for Windows 8 or 7, and apply changes.

If the app still crashes after these steps, let me know what happened after each step, and we can explore more advanced options!

Are you satisfied with these initial steps? I’m here to help you through this.