I have the same issue with the file being corrupted. I cannot unzip them. I was able to unzip the files a month ago but not able to load them in my truck. This has been a issue for me with corrupted download from Ford for a month now.
I am having issues as well with Lariat. I have downloaded the files to the USB stick. When I put the stick in the USB it says the file is loaded and will be installed at next startup or something like that. I have tried it over the last couple days and it still does not update.
I was driving to San Diego from Arizona today and we stopped at the dunes to watch some side by sides. There were some kids stuck in the sand in a VW. I pulled them out with my stock tired Lariat Ecoboost. Just put it in sand mode, and had no problems.