haha yeah I can live with being a cheater :) the game is fun but I would need to take a lot more time than I have to get really good with the knife in order to do it legitimately
So here's how I modified the DLL. There are tools you can get that let you rebuild the source code of .NET applications by reading the bytecode in the DLL file - I used "ILSpy" with the "Reflexil" plugin to do this.
All your game scripts are compiled into "Managed/Assembly-CSharp.dll", so I just needed to find the right class name (Health_and_Damage) and make a change to it. I just deleted the code inside the "SumarVida" and "RestarVida" methods and that did the trick :)
BTW thanks for mentioning this project to Kai Morgan, I would not have found it without that.