armand, it's not "my" ERA, it's official. You aren't going to find any better. I don't know why it is named 2.461.
As for antiviruses, ERA is a mod and a modding platform, meaning it changes the game code while the game is running to implement its functionality. Of course it would be considered suspicious, as viruses do the same. As you may see from your results, the antivirus declares ERA components or various tools a virus based on unreliable heuristic indications. Antiviruses aren't perfect, armand, sometimes they need to be overruled by common sense.