To clear all inactive transfers [files 100% downloaded and not seeding]:
- Tap on the hamburger icon in the upper left corner to access the 'Main Menu'
- Tap 'Transfers'
- Tap on the 'Clear' button in the upper right corner
- Tap on 'Stop Transfer'
To clear all transfers, tap on the 'Stop' button first [this will stop all transfers] and then on the 'Clear' button.
NOTE: If you stop a download in progress, all the files associated with that download will be deleted.