Hi! I understand that your Next Toppers app isn't opening and crashes when you try to launch it on your Windows device. Let's get this sorted out together.

To start off, may I ask:
- Have you been able to open the app successfully before, or is this a new issue?
- Did the app crash immediately upon launch or after some time using it?
- Have you tried any troubleshooting steps so far, like restarting your computer or reinstalling the app?

Once I know a bit more, we can try some targeted fixes. In the meantime, here are some common steps you can try to fix app crashes on Windows:

1. Restart Your Computer: Sometimes a simple reboot can clear out temporary glitches.

2. Update the App: Ensure that your Next Toppers app is the latest version. You can check for updates on the official Next Toppers website or wherever you downloaded the app.

3. Clear Cache or App Data: Sometimes corrupted cache or data causes crashes. As this is a Windows app, look for an option to clear its cache or data within the app settings or Windows app management.

4. Run as Administrator: Right-click the app icon and select "Run as administrator" to give it proper permissions.

5. Reinstall the App: If the above steps don’t help, uninstall the Next Toppers app completely and then download the latest version and install it again. This often resolves corrupted files causing crashes.

6. Check for Windows Updates: Make sure your Windows 10 system has all the latest updates installed; sometimes outdated system components can cause app issues.

7. Check Compatibility Mode: Try running the app in compatibility mode for an earlier version of Windows if it's a recent issue.

If after trying these steps the app still crashes on launch, please let me know. We can then look deeper into logs or permissions. Also, let me know any error messages you receive. That info will help me guide you further.

Have you tried any of the above already?