To recover your 7z file password you can use this best tool, eSoftTools 7z Password Recovery Software with amazing features of password recovery. This tool comes with a free demo version. Also it can recover multilingual passwords. And you can use this tool with any Windows OS versions (Windows 10, 8, 7, and so on). Brute Force Attack, Mask Attack, and Dictionary Attack are its three password recovery techniques.

Link:- https://www.7zpasswordrecovery.com/