What does it do?
It does not physically move the layers back to the main timeline, but it lets you edit them without opening the precomp. How to Download and Install Free Unprecompose Scripts
: A one-click script that respects the pre-comp's in-point and integrates with kBar . Manual Method (No Plugin Required)
: Free / Pay-what-you-want on aescripts.com and BatchFrame.com .