Hi there! I understand your Time4Care app keeps stopping when you try to open it on your Windows-based device using WebKit browser. To help you better, could you please clarify if you are using a dedicated desktop app or accessing Time4Care through a browser? Also, do you recall if this issue started recently after an update or change?

Meanwhile, here are some general steps you can try to fix the app crash on startup:

1. Clear Cache and Data in Browser (if using web version):
Sometimes, corrupted temporary files can cause loading issues. You can clear your browser cache and cookies:
- Open your browser settings (in WebKit-based browser, go to settings or preferences).
- Find the option to clear browsing data or cache and clear it.
- Restart the browser and try again.

2. Reinstall the App (if using a desktop app):
- Uninstall Time4Care app fully.
- Restart your computer to clear any lingering processes.
- Download and reinstall the latest version from the official Time4Care source.

3. Check for Updates:
Ensure your operating system, browser, or app is fully updated. Sometimes outdated software causes compatibility issues.

4. Restart Your Device:
A simple restart can refresh system resources and fix temporary glitches.

5. Run the App in Compatibility Mode (Windows only):
- Right-click the app icon or executable file.
- Choose 'Properties', then go to the 'Compatibility' tab.
- Select a Windows version (like Windows 8) to run the app in compatibility mode.
- Apply the changes and try launching the app again.

If these steps don't resolve the issue, please let me know if there are any error messages or if the app crashes immediately or after some time. That will help me guide you better.

Are you satisfied with these initial suggestions?