The software will not be updated for newer operating systems or the latest versions of video editing software.

The artwork showcases 31 distinct eyes, each with its own character and charm. The diversity in design ranges from realistic portrayals to highly stylized and fantastical creations, ensuring that no two eyes are alike.

One of the most valuable additions in the 3.1 era was the set of quality control tools designed to ensure a perfect sync before exporting:

(by Red Giant, now part of Maxon) is audio/video synchronization software. The last major version was PluralEyes 4 — there is no official "PluralEyes 31." You may have encountered a typo or a misleading website.

Please clarify what you actually need (e.g., tutorial, alternative software, workflow advice), and I'll be happy to provide a long, detailed, helpful response — legally and ethically.