CAM posters are framed with poster-template.png from Pletch's data folder when there is one: a PNG with a transparent window the poster shows through, and room below it for the label. poster-template.json beside it can set the label's color, like {"text": "#e5a00d"}. Without one, they're framed in Plex's grey with the label in Plex's yellow.

Stopping Pletch unmounts its library folders; Plex can't play from them until Pletch starts again.