What should I use to jailbreak my second gen iPod touch?

I needed to re-jailbreak it because when updated cydia it messed up and wouldn’t work. I restored it, and got the 3.1.3 os for free A bit of a curse and a blessing and am having trouble finding what to use. I tried redsn0w 9.4 but it doesn’t make any sense. I just need links to what software will work with windows, and how to use it simply. If you can get the just of redsn0w than please help, but for some reason 9.4 doesn’t make any sense.