Unless you have had experiences which are better answers to the questions in the interim use the same ones. (Unless they were pants to begin with).
During my interview I was faced with the dreaded repetition of a story having used it too soon. But since the question was along the lines of the 'most challenging' (can't quite remember but it was something like that) I said 'The example I gave you when I did x was the most challenging - I can give you another slightly less challenging example if you wish.' They said - 'No, that's fine' and went on to the next question.
If you can offer to repeat a story in the same interview I would have thought doing it a year later would be fine!
In fact, unless all your new examples are very recent I would be suspicious as to how your past had changed so much in the the interim
