stopped working

[Clifford Andrews]

ver 6.9 on windows 7 ultimate. just stopped working won’t load anymore

System.ArgumentException: An item with the same key has already been added.
at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at ()
at LaunchBox.Search.LocalDb.GetPlatforms()
at (String , Boolean )
at LaunchBox.Search.LocalDb.GetValidPlatformName(String name, Boolean officialOnly)
at (String )
at LaunchBox.Search.LocalDb.GetPlatform(String name)
at (DataManager )
at LaunchBox.Data.DataManager.AddMissingPlatforms()
at (DataManager , Boolean )
at LaunchBox.Data.DataManager.Load(Boolean settingsOnly)
at LaunchBox.Data.DataManager..ctor(Boolean bare, Boolean settingsOnly)
at (String[] )
at LaunchBox.Program.Main(String[] args)