Crush the crackers finely, then mix them with the melted salted butter and combine well.

Once the mixture is well combined, spoon it into a mold, press the cracker mixture firmly, and then chill in the freezer.

Beat the cream cheese until smooth. Add the sweetened condensed milk and evaporated milk, and beat until combined. Then add the lemon juice and mix until the cream cheese is smooth and creamy.

Remove the pie crust from the freezer, spoon the cream cheese mixture over the crust, and freeze again until the cream cheese is set. Remove from the freezer and top with canned blueberries as desired.