need help installing JTR on windows [SOLVED]

when i download the windows version of JTR from http://www.openwall.com/john/ an try to extract it with winrar, he can't extract it giving the error archive has an unknown format or the file is damaged. also my AV gives a warning but i push ignore, so it shouldn't change the file.
please help me here, have no idea what to do
please help me here, have no idea what to do