Instructions for Re-Downloading the League File
OK, if you really messed something up and want to reset your actions since the last league file was generated, here's instruction on how to do it.
In the game go to:
File > Settings > Troubleshooting > Open folder containing saved games
Open WLBonline.lg folder
Open Settings folder
Make sure it's that file before deleting. Then try Downloading the League File (you might have to close and reopen the game).