We left a nasty save bug in for the release where if you buy some store items your save will become corrupt.
An update is going out this afternoon which will fix the core issue, but will not repair saves.
To repair the save, please navigate to the folder described here: http://forums.mode7games.com/viewtopic.php?f=39&t=10494
Within LVLeagueManager or LVLeagueManagerEasy, open Player/mainSav.sav
Search for any lines which start with
And delete them, and then save the file.