"Don't send complete flag." means mRatio will not tell the tracker when the torrent is complete, but you still need to pass from leeching the torrent to seeding the torrent on the tracker, so theres 2 options to surpass that:
Option 1: Waits until the normal update announce time, then Stops the torrent and starts it as a seeding torrent.
Option 2: Instead of sending the complete flag, stops the torrent and starts it seeding right on the moment you complete the torrent, not waiting until the normal announce time.
You will still pass from leeching to seeding the torrent, you just need to choose how that process is made.
Will be fixed on next version.