Uninstall VLC then :), that should clear any file associations, once your done reinstall VLC if you really need it. Though I would probably just change/clear the file association personally, right click>open with> on the new window where you choose the programe, there is also a tick box so it remembers your choice.

Regardless, it's a windows file association issue so flashing the image to the box shouldn't brick it :)

.Me