Hello! It sounds like you're encountering some trouble launching Star Equestrian, and I'm here to help.

Just to clarify a bit, could you let me know the specific steps you've already taken before this? For example, have you deleted all the Star Equestrian files from your PC, or cleared the cache and cookies of your web browser? It's crucial to ensure that all of the game data is fully removed before reinstalling.

Here’s a step-by-step guide to tackle this issue:

1. Remove Star Equestrian Completely:
- Go to Control Panel > Programs > Programs and Features.
- Find Star Equestrian in the list, select it, and click Uninstall.
- After uninstallation, navigate to the folder where Star Equestrian was installed (usually in C:\Program Files or C:\Program Files (x86)) and delete any remaining files in that folder.

2. Clear Cache and Cookies:
- Open your WebKit browser, and go to the settings.
- Look for the option to clear browsing data or history, and ensure you select both cookies and cache to delete.

3. Run as Administrator:
- When you reinstall Star Equestrian, right-click on the installer and select "Run as administrator." This can help avoid permission issues.

4. Update Graphics Drivers:
- Ensure your graphics drivers are up to date, as outdated drivers can cause launch issues with many games. You can check this by going to your graphic card manufacturer's website.

5. Reinstall Star Equestrian:
- Download the latest version of the game from the official site to ensure it is up to date.

Once you've followed these steps, attempt to launch the game again. If the issue persists after trying these, it may be helpful to check for any specific error messages that appear when you try to launch the game. This could help point us in the right direction.

Are you satisfied with the solution I provided, or is there anything else you'd like to explore?