Home › Forums › SharewareOnSale Deals Discussion › Easy Invoice Software / Jan 27 2016 › Reply To: Easy Invoice Software / Jan 27 2016 Jan 27, 2016 at 12:25 pm #4117688 Quote mondonGuest I also followed the steps to install and register to the cue, but am getting an “invalid key” message. Can someone help me with this please. I would really appreciate it.