I purchased and mostly downloaded Lion. At about the 80% and error popped up saying that the application could not be downloaded with the error: NSInternalInconsistancyException. The only option is to cancel or retry. Retrying failed, so I clicked cancel, and restarted my computer to try again. Now Lion shows as installed in the App Store, and there is no installer icon anywhere on my computer. There is also no way to download again. What now?