Hi! I understand you're experiencing freezing issues with the LEROY MERLIN app design tool when downloading a room sketch. Let’s try to pinpoint the cause and get this sorted out.

Could you tell me a bit more? For example:
- Does the freezing happen right when you start the download or partway through?
- Are you working with particularly large or complex room sketches?
- Have you noticed if this happens every time or just occasionally?
- Have you tried restarting the app or your computer?
- Also, is your Windows 10 OS up to date?

Meanwhile, here are some steps that usually help with freezing issues during downloads in design tools:

1. Restart the App and PC: Sometimes, temporary glitches get resolved by a fresh start of both the app and your computer.
2. Check for App Updates: Make sure the LEROY MERLIN design tool is updated to the latest version, as updates often fix bugs like freezing.
3. Clear Temporary Files/Cache: Cached data might slow down or freeze the app. You can clear temporary files via Windows Disk Cleanup or through app settings if available.
4. Close Background Programs: Other heavy apps running in the background can affect performance. Close unnecessary programs to free up resources.
5. Work with Smaller Files: If your room sketch files are large or complex, try exporting or working on smaller sections to see if freezing persists.
6. Run as Administrator: Right-click the app icon and select ‘Run as administrator’ to ensure it has the needed permissions.
7. Check Internet Connection: A stable internet connection is important if downloads are involved.

If these don’t help, I may need to look into any specific issues reported with the LEROY MERLIN design tool related to room sketch downloads or possible compatibility problems on Windows 10.

Could you please confirm the details above and any steps you've already tried? This will help me guide you better.