Prepare the crust: In a small bowl, mix the vanilla wafer crumbs with melted butter until well combined. Press this mixture into the bottom of a 9-inch springform pan coated with nonstick cooking spray. Set aside.
Make the filling: In a small saucepan, cook the crushed pineapple with sugar over medium heat for about 5 minutes or until heated through.
Dissolve the gelatin: In a separate small bowl, sprinkle the gelatin over cold water and let it sit for 1 minute to soften. Stir the gelatin mixture into the hot pineapple mixture until dissolved.
Add cream cheese: Reduce the heat to low and add the cubed cream cheese. Stir continuously until the cream cheese is completely melted and the mixture is smooth.
Cool the mixture: Remove from heat and allow the mixture to cool completely.
Combine the fruits: Once cooled, stir in the grapes, mandarin oranges, cherries, and pecans. Gently fold in the whipped topping until everything is well combined.
Assemble the cheesecake: Pour the fruit and cream cheese mixture into the prepared crust and smooth the top with a spatula to ensure an even layer.
Chill and serve: Cover the cheesecake with plastic wrap and refrigerate overnight, or at least for 6 hours, to allow it to set. Once set, remove from the springform pan, slice, and serve chilled, garnished with additional fresh fruit or a dusting of crushed vanilla wafers if desired.