Hi there! I understand the Star Merge app on your Windows device won't open, is that right? To help you better, could you tell me if the app shows any error message when you try to open it, or does it just not respond at all?

Meanwhile, here are some steps we can try to get it working again:

1. First, let's try restarting your Windows PC. A simple reboot can often resolve temporary glitches that prevent apps from launching.

2. After restarting, check if there is an update available for the Star Merge app. Even though you're on Windows, if you installed the game through a platform like the Microsoft Store or a website, go back there and ensure you have the latest version.

3. Similarly, verify your Windows 10 is up to date by going to Settings > Update & Security > Windows Update, and then click "Check for updates." Installing any pending updates can fix compatibility issues.

4. If the app still won't open, try uninstalling Star Merge completely:
- Open Settings > Apps & features.
- Find Star Merge in the list, select it, and click "Uninstall."

Then, restart your PC again.

5. Reinstall Star Merge from the official source you originally used, ensuring you download the latest version.

6. Before launching, make sure your game progress is backed up or your user ID is noted if possible, to avoid losing progress as a precaution.

If after all these steps the app still won’t open, please let me know. We can explore deeper troubleshooting or potential issues such as corrupted game data or network problems.

Are you able to try these out now?