They just naturally expire over time
Reading the VLC forums I can only suppose that it is another update, not to VLC but to something else that has caused it.
Similar problems, you will have seen are reported on the forums
these are a few months old but the same principle
Good luck with it please do come back as soon as you have a problem especially of course the BSOD
Edited by Macboatmaster, 28 October 2012 - 06:48 PM.