I personally don’t think that the curse is starting over again or that they would lose their memories. That’s a quick way to lose their audience, and after reading some theories
With the cast talking, especially Snow about her relationship with Emma
I am lead to believe that the curse did not start again.
I am curious if a new curse is now intertwined with the older curse, or preventing the other curse from becoming broken, but as stated, I don’t think they went back to square one.
Perhaps its just symbolic like the opening of the eye was for LOST.