I purchased a video player app that has more options than the stock video player. Every time I tried to play a video I got a pop-up asking which of 3 apps I wanted to use (the stock app, the purchased app, and one other that I can't remember). To eliminate that pop-up I finally check-marked the box in the pop-up to make the purchased app the default. Now it automatically always plays videos with that app. That was good until now, but I want to temporarily use a different app. Is there a way to change the default, or undo making that purchased app the default so I get the pop-up again that asks which app to use? I can't find anything in the DX's options or in the purchased app's menus to do this.