If you use Mac or Windows and selected Help > Check for Updates and/or are told that a newer version is available, the software will offer to automatically download and update to that latest version.
If for some reason it does not successfully complete the automatic update, you have a couple of options:
1. You can always (re)download the latest full version of the software from your personalized download link, from the email that was sent to you at purchase time; or
2. If a download link appears directly in the automatic update notification, you can click on that to go to your personalized download link.
(Note: this does not apply to the free demonstration, Mac App Store, or Linux versions.)