If your Android powered mobile device starts to open files with your Super Dispatch app, but you'd like those files opened with another App, please follow these steps.
1. go to -> settings
2. -> Apps
3. -> Super Dispatch
4. -> Default settings
5. -> Clear defaults
Afterwards your phone will open files as it used to do before
Or alternatively you can download your desired pdf reader from the Play market and set it as your default.