For more recent legacy versions (post-2019), you may need the Maxon App along with a specialized "Serial Filler" tool to register your old keys. Key Features of PluralEyes 3.5

PluralEyes 3.5 was a pivotal audio-video synchronization tool released by Red Giant (now Maxon) in 2014. It revolutionized post-production by using waveform analysis to automatically align footage from multiple cameras and separate audio recorders. Animation World Network Status and Availability Red Giant Announces PluralEyes 3.5.

: Older versions like PluralEyes 3.0 are no longer available for public download. However, existing users with a valid serial number can still request installers for PluralEyes 3.5 and other versions by contacting Maxon Support