Final Cut Pro X

An application was installed on Petronella Osgood's computer by 10 May 2020. Its logo was a clapperboard with a colour wheel in its centre. (WC: The Zygon Isolation)

Behind the scenes
While the application was not named in WC: The Zygon Isolation, in the real world, the application is called "Final Cut Pro X", in the real world. It's professional non-linear video editing software.