Look, here is how it should look like :
First, i put myself in the directory where hpatchz.exe is :
Then i start to write the command starting with hpatchz.exe with the path where DecliningBirth-WindowsNoEditor.pak is :
After i write the path where the update file (.diff) is :
Finally i write the path where i want the .pak file to be + i give it a name, as for example i named it "result.pak" :
To finish, you just have to follow what i said earlier : "After executing the command it should create a .pak file and to finish you just have to rename it to DecliningBirth-WindowsNoEditor.pak and replace the .pak file in Declining Birth\DecliningBirth\Content\Paks\ by your new one freshly created."
That's all.
PS :
If you have a directory with spaces in their name like me :
On Windows you have to surround your command with double quotes ( "" ) like me to make it work :
