Well I try one more time.

First you have to google “java” and install the free version,
Second unzip to a folder of your choice the RPG_Maker_MV_Decrypter_jar_0.1.3.1_hotfix,
run the Java-RPG-Maker-MV-Decrypter.jar, opens a window,
from menu
File → Change Output Directory select “output” and click open.
Next
File → Select RPG MV Project and select your game folder click open, another small window appears click “ok”.
Next
From menu, select Decrypt → All Files
Wait until Decryption Completed. Click ok, close program.
Open the folder where you unzip RPG_Maker_MV_Decrypter_jar_0.1.3.1_hotfix and select the folder output, in this folder exists one more folder www, in that folder you can find all the pictures, images, audio etc.