If you try to unlock password protected 7z file try eSoftTools 7z Password Recovery software. Because you can easily use this software and recover any type of password from a 7z file. The best thing about this software is that it is compatible with all Windows versions. Before buying the software, you can take a free demo of this software, the demo allows you to see only the first three characters of the password from the 7z file.

INFO;-Unlock password protected 7z file