Does any message appear or is it only at 137%? This particular file is one of the largest, so it’s normal to stay on that number for a while (it usually doesn’t crash, it just takes a while to download)
False Positive. You for sure do not need to worry about this and should rather make an exception for plutonium. There is a 100% chance that a virus does not exist inside anything made by the Plutonium team.