Thanks Matthew,
My project only have blueprints scripting (I know nothing yet about C++).
So I just installed Visual Studio 2015 and configured it following the UE documentation. Same with the UnrealVSExtension.
But now I do not succeed in opening my project in Visual Studio… Sorry I’m a newbie here, but I cannot find how to do that in the online documentation. Should I generate a Visual Studio project in UE?