Invert axis on a “drag rotate” puzzle

How do I invert the rotation of an object when using the “Drag rotate” puzzle?

In a project of mine i have a couple of doors that can be rotated by clicking and dragging over them. However the movement feels backwards.

User @gliftek suggested using a “numbers puzzle for multiplication times negative 1”. But I don’t understand how to do that.

Staff member @ivan suggested adding this line of code in the main .js file:

if (app.controls) {
    app.controls.rotateSpeed *= -1;
}

But doing so doesn’t seem to do anything in my case.

IDK maybe I’m just missing something obvious here.