PolySmoother v2.6.1 for 3ds Max 2014 – 2022
http://www.scriptspot.com/3ds-max/scripts/polysmoother
It allows you to visualize and manage the Smoothing Groups in a quick and easy way. You can set Hard and Soft edges, select edges by convexity, copy, paste, modify and optimize Smoothing Groups, as well as convert them from and to UV mapping, among many other features.