I cannot use Prepare because I can't register it. I enter my serial number and my MAC address (found in system preferences), which is the only machine ID I can find. When I open Prepare I just get a "Trial expired" message with a "Purchase Options" button. I have already purchased a subscription and just want to register it so that I can use the software. I have e-mailed Sony for help, but that is the only avenue I have to get assistance from them and I need to get this working ASAP. If you know how to fix this problem, I would be hugely appreciative of any information you could provide. Thank you very much.
I found the solution. I held down shift and command when I double clicked the Prepare icon to open the program. That brought up the registration screen where I was able to enter my e-mail address and password and now I'm in business. It looks like it would be shift+Win on Windows.