Excel password crackers have changed drastically. There's no need to install some programs on PC in order to crack a password-protected file - it can be done remotely with the help of online services that specialize at password recovery. To crack an Excel password, they exploit much more powerful hardware, thus making password removal more efficient. Some services ( www.password-find.com to name one) already even offer instantaneous password removal for files with .xlsx extension (Excel 2007 and upward). Can't see any reason to use password-cracking software anymore.