I recently made a cruise reservation through DCL's website for January 2018 but its new version's functionalities are virtually nonexistent. It seems that I am unable to do anything other than change staterooms and/or make payments. Is that correct? 
From my previous experience with DCL, I slightly remember the possibility of changing dates, itineraries, guests and travelling information but know I am confused.
The worst part is that according to the confirmation e-mail, our passports numbers are already on file but I renewed my passport recently and never had a chance to update it.
What should I do?

From my previous experience with DCL, I slightly remember the possibility of changing dates, itineraries, guests and travelling information but know I am confused.
The worst part is that according to the confirmation e-mail, our passports numbers are already on file but I renewed my passport recently and never had a chance to update it.

What should I do?