The Durazno tool is a tool for adjusting and compensating the Deadzone of controllers.
In Dark Souls III, its used to compensate angles created by the Controller's Left Analog stick for movement in setups such as the alignment to throw Firebombs.
These angles are usually precise but are usually easily messed up because of the sensitive nature of the control sticks from Controllers on Dark Souls III.
When you lineup your angle for setups in for example throwing firebombs, the left control stick which determines the players movement can be drifted slightly left or right and effects you when you push forward on the keyboard to line up. Notice when you have your controller connected and you press W (Forward) on your keyboard how your character slightly runs left or right when running forward. This program fixes that because the deadzone is so sensitive.
The download for Durazno can be found HERE