The Plugins pane
Open Plugins from the menu.
Install and manage plugins
Click the gear on the selected plugin's card to manage it.
Animation preset packs
Install an animation .ogsplugin.zip, select one or more objects, then open Plugins, choose Animation and select the pack's card.
Shader packs
Install a shader .ogsplugin.zip through the Plugins pane, then choose Shader and select the pack's card and version.