Hey Alain!
Make sure if you have any antivirus software (both PC and browser), to allow it through, as sometimes it can be flagged as a false threat, and cause the download to corrupt/cancel.
If you're having trouble with downloading here on Itch, I'd recommend trying one of our Patreon downloads. Here's the latest free version:
https://www.patreon.com/posts/v0-7-7-free-105776959?utm_medium=clipboard_copy&ut...
I hope that helps!