Sorry guys, I think you are wrong about having to start from scratch. The official CIC Canadian website states -
"You can only use your examination results in your application for 12 months from when you had the examination. If you are not admitted to Canada as a permanent resident within this time, you will be required to undergo another examination."
It does not say that you have to begin the process again.
I think the phrase "If you are
not admitted to Canada as a permanent resident within this time" pertains to cases wherein the visa office has not yet made a decision on an application whether to grant you a permanent residence visa or not.
It doesn't apply to those cases wherein a decision has already been made by the visa office.