Hi Andre,
Have you tried uninstalling then reinstalling Little Reader after the Windows 10 update? If you haven't, please try that first.
After reinstalling Little Reader, you can try downloading your curriculum again.
In case you are still getting errors, please email us at support(at)brillkids(dot)com and attach your diagnostic report so we can troubleshoot.
For instructions on how to make a diagnostic report, see:
http://support.brillkids.com/entries/20438423-how-to-create-a-diagnostic-report-for-your-brillkids-learning-system