You can change your production's current script to a new file you've uploaded by doing the following:
- Tap Documents icon in the upper left corner of the script to view all the files in your Binder.
- Tap "Select" in the upper right corner and choose your file.
- Tap "Set as Current Script"
Once you've changed your current script, you can archive or delete any files you don't want to keep in the Binder.