Open the zip file and type your SuperKey of your choice in the file "superkey-here.txt" and save it.
Flash the zip in Recovery Mode or ADB Sideload.
Reboot to System.
Install the APatch apk. https://github.com/bmax121/APatch/releases
Open the app and type again the same SuperKey as in "superkey-here.txt" from the zip file.
IMPORTANT NOTE: Prefer letters, numbers and symbols for more security.
Enjoy your rooted device!