I'm still having a hard time tracking this one down. Any details about the system your friend is running would be helpful. Giving me a dump of all the processes running at the same time as CoolFish would be useful. Sometimes other programs can interfere with it. Do you know if it happens immediately when he runs it or does it happen after running for a little while?
Manually download the latest version here: https://github.com/unknowndev/CoolFish/releases/latest