Installation
You can either install Limber using the aescripts manager app or you can download it and, inside After Effects, go to
File > Scripts > Install ScriptUI Panel…
and navigate to the Limber.jsxbin file that you downloaded.
Go to the General tab of After Effects’ Preferences pane and make sure that ‘Allow Scripts to access the network’ is checked on.
Restart After Effects and start Limber by clicking Window > Limber (you might need to scroll down)