You should try eSoftTools 7z password recovery software to crack 7z file password. It has 3 advanced techniques- Brute Force Attack, Dictionary Attack and Mask Attack. This tool saves the recover 7z file password on the clipboard.This tool supports ANSI and Unicode format.It can also provide a free demo for user satisfaction in which users restore 3 initial letters of 7z password.
Read More:- https://www.esofttools.com/blog/how-to-unlock-a-password-protected-7zip-file/