Welcome to the Customer Support.
Don’t hesitate to browse through all sections to discover MNemo and Ariane.
Enjoy.
Sébastien
When opening the downloaded file on your Mac with Mac OS 13, a message will be displayed saying the file is damaged. Don’t worry, everything is correct! You’ll have to allow the software in the security settings.
In the Finder 
on your Mac, locate the app you want to open.Don’t use Launchpad to do this. Launchpad doesn’t allow you to access the shortcut menu.
Control-click the app icon, then choose Open from the shortcut menu.
Click Open.
Open a new Terminal window and type (or paste the following command):
xattr -d com.apple.quarantine /Applications/Ariane.app