Aescripts licenses are single-user. Sharing violates terms. However, you can install on two personal machines (e.g., desktop + laptop).
Updates expressions within the new comps to point to the newly duplicated layers rather than the originals. Smart Naming: True Comp Duplicator Script Free Download
By default, After Effects creates "instances" of compositions, not unique copies. This is where the becomes the most essential tool in your motion design arsenal. What is True Comp Duplicator? Aescripts licenses are single-user