You can unlock password-protected 7zip files with the help of eSoftTools 7z Password Recovery software. This software is able to recover any type of combination password. There are three methods in this tool that help you to recover the 7z file password without taking much time. These are three methods brute force attack, mask attack, and dictionary attack. It also provides a free demo edition where users can easily recover the first three characters from their 7zip file passwords.
More Info - Unlock password-protected 7zip file