C'est un jeu de 2014 (Lone Echo est 2017). :)
En francais? C'est vraiment dommage, mais nous sommes un très petit studio indépendant.
It's a false positive. The installer uses Inno Setup and the game itself uses QT for launcher and Wintermute Engine for the game. I tried to scan it with NOD Antivirus and no alarms registered. I packed it last night and had no issues.
I was however looking into this a bit more, and it seems that Norton issues this warning for some C++ programs (Wintermute engine is a C++ engine after all).