I'm pretty sure there's a program you'd use. I don't know what ones will work though, so just try a few. https://www.google.com/search?rlz=1...b&fp=e50b7ed8b228eb18&biw=1366&bih=655&ix=sea Your answer should be somewhere in those results.. I know I'm not very specific, but I don't want to recommend a program I haven't used.
uhm.. Try looking for a "Free" version on the internet somewhere. You may need to download it through some sort of p2p thing. I'm being very vague... Other than that, since someone at your school made it, the password is probably just a dictionary word. You could easily bruteforce it but that wouldn't remove the password.
