The trailers will work on the latest versions of PreShow without an update. Trailers used to require updates every time they broke, so I added a website middleware to do the scraping portion of it and PreShow now just looks at that link. That being said, PreShow doesn't delete all your current trailer records and install the new ones. You can reset your content database and scan your content to make sure that you are getting the latest content, if you want to see the new trailers immediately. Also, the trailers can only be scraped a max of 1 time a day.