So if I set my locale to jap, extract it and bring it back to normal, that alone should fix it? I'll try that when I wake up, thanks.
Since it's a Unity game, yeah, I THINK you could do that if you *really* don't want to download that 285 MB again from the OP... Don't forget you'll need the translation fix patch as well.
I'd just redownload. Also, wouldn't change locale and restart the machine just to unzip something correctly then change back with another restart. And every time I see a .zip... That would just annoy me. Take my advice and set your WinRAR up correctly for such occasions.
Also, if it were another game engine(, heck, maybe even for some Unity Japanese games too), you may actually still need Japanese locale to run the game correctly (or at all), so get 'Locale Emulator' (and maybe NTLEAS - another emulator; but 98% of the time Locale Emulator will suffice)... Just my 2 cents.