In my Trainz 22 PE I have a build of 123801 but I'm seeing higher builds on the forums yet when I check for updates it tells me no update for Trainz is available at the current time. I checked the download page and there are higher build numbers for 22 in the installer downloads but there is Platinum at 126273 and a retail edition build of 128487 Why is Platinum a lower build? If I want a newer build do I need to install one of those and install another copy of Trainz 22? Should I download the 128487 build? It's 14 GB vs. 11 GB for the PE build. How do you get 22 SP5? Is that available in the retail edition or is it Plus only?