Because Adobe extensions (.zxp) cannot be opened directly like standard applications, you must use one of the following methods:

The direct answer to your query is that is an older version of the Adobe extension by Battle Axe used to instantly transfer vector shapes between Illustrator and After Effects. To use it, you typically need to install the Overlord.zxp file using a specialized installer or a manual method . Installation Guide

If the installer fails, rename Overlord.zxp to Overlord.zip , extract it, and manually copy the folder to your Adobe extension directory:

C:\Program Files (x86)\Common Files\Adobe\CEP\extensions\ Mac: /Library/Application Support/Adobe/CEP/extensions/