Simply double click on the 7zip archive file to open it. But encrypted files need the exact password to provide access to the user. In an off chance if the user forgets the password and wants to remove password from 7zip file then try tools like eSoftTools 7zip Password Recovery Tool. It lets the user restore any type of password like alphanumeric, symbolic, numeric, and alphabetic. The user has 3 different options for password restoration which consists of methods like Dictionary Attack, Brute Force Attack, and Mask Attack. Just choose the file and select the recovery method. And the entire process will be managed by the tool. The internal data will remain unchanged.

Visit here:-
Default Remove password from 7zip file