Preheat the oven to 375˚F.
Add cherries and peaches to a medium bowl. Add sugar, bourbon, flour, salt, cinnamon, and vanilla bean paste. Toss to coat the fruit evenly.
Place the filling in a 2 1/2 quart baking dish (or 9x9-inch baking dish). Spread in an even layer and sprinkle the filling with the butter pieces.
Add oats, sugar, flour, cinnamon, and salt for the crumble to a separate medium bowl. Add the softened butter and use your hands to mix it up. Make sure to pinch the larger pieces of butter together with your fingers to break it up. Continue to mix in the butter with your hands until the mixture is crumbly and feels like wet sand.
Sprinkle the crumble mixture over the fruit filling evenly.
Bake for 35 to 45 minutes, until the fruit is bubbling and the crumble topping is golden.
Let cool about 5 minutes before serving with your favorite vanilla ice cream.