I was lucky had the previous version installed! usually i'm pretty strict in keeping software upto date.
You've done the best thing in that situationDidn't have the infected version so there was not much to do.
My dad, on the other hand, had that infected 32-bit version on his system where he had been using only admin account, didn't have any restore point saved and never made system image.
During a visit, I did format and fresh install with SUA to use on daily basis and made a clean system image for him to have.