What build do you have? If it's 453 don't bother updating it as all the newer builds do is add the Magix name to and could potentially mess up any scripts you're currently using. If it's older than 453, then folloe the instructions in the https://www.vegascreativesoftware.info/us/forum/how-to-download-vegas-pro-13-0-build-453-last-sony-version-pre-magix-etc--103229/ thread for updating it to build 453 and no newer.

Mike