"Index was out of range" error when updating metadata

[Frank Kao]

I have a very large library (over 25K). Tried updating all new metadata and downloads:

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')

App: LaunchBox
Version: 13.6
Theme: Default
Type: System.ArgumentOutOfRangeException
Site: Void ThrowArgumentOutOfRange_IndexException()
Source: System.Private.CoreLib

at System.Linq.Enumerable.WhereListIterator1.ToList() at Unbroken.LaunchBox.Windows.Desktop.MenuActions.DownloadMetadataAndMediaMenuAction.<>c__DisplayClass16_1.PushAbstractUtils(Game game) at Unbroken.LaunchBox.Windows.Threading.<>c__DisplayClass7_11.SelectCommonFilter()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

Recent Log:

9:03:15 AM Exception