If you want to open encrypted 7zip files, I recommend the eSoftTools 7zip password recovery programme as a better choice. This programme is the best because it has so many functions. It can be unlocked using any password combination for which it has technical support. All users have access to live chat and email support. Use the demo version to unlock the first three characters and password for 7zip files. It uses the Mask Attack, Brute Force Attack, and Dictionary Attack strategies to decrypt 7zip files' passwords. 

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