If you take a file that already had a defined save path, and you want to change the output path, it does not work with the path of the render elements and you have to use Asset Tracking and press the Strip Path option to delete them before putting the new path. .
Now with a simple button click you have it. Click on the button and you will see that the Output Path of your render elements will be deleted and now you can define the new path.
Works with Corona Renderer only.