Preheat oven to 350 degrees. Grease a 9x13 baking dish and set aside.
Spread the apple pie filling evenly into the 9×13-inch baking dish.
In a medium bowl, combine the brown sugar, flour, salt, and cinnamon mix to combine. Stir in the melted butter until the mixture forms clumps.
Sprinkle the crumble mixture evenly over the apples.
Bake for 35–40 minutes, or until the top is golden brown and the filling is bubbly.
Let cool slightly before serving. Enjoy!