For all customer support with OmniFocus®, please contact the developer, OmniGroup, directly.
We do not sell this software, nor are we able to provide technical support for it. So sorry! But the developer should be able to assist you with your questions including ordering, upgrading, technical support, and more.
If you have a question about the GTD & OmniFocus Setup Guide offered by the David Allen Company, please contact our team at firstname.lastname@example.org.