Woops! I forgot to answer your question in my last post... My apologies. Actually, I don't know the answer to that. I applied and sent my C.V. through cabincrew.com website this time then several days later I was called to the AD(although now I cannot apply for the position of cabin crew on the EY career website but I attended the assessment in September).
Probably you don't really have to worry about updating your profile on their career website because you can send your updated C.V. through cabincrew.com website as I did. When they hold the AD in Australia, they will notify on cabincrew.com website as well.
Hope this will help you.