3ddd is not responsible for this extension. All risks associated with the use of this extension are borne by the users.

Video about the script: https://youtube.com/shorts/biTkcVoVpac?feature=share 
https://vk.ru/clip-226908262_456239102 

Script for rolling back Chamfer edges and smoothing TurboSmooth on a collapsed model, after converting to Editable Poly.

Other scripts: https://3dsky.org/collection/shared/5514167 

Installation:
Drag the script into an open 3ds Max window.
Next: Customize - Customize User Interface - Toolbars, category sofiakholina.
Drag PolyBack onto any panel.

If the script is not working correctly or you encounter an error — please report it.

How to use:
Select one or more models or part of a model (Element) and press the desired button.

Back Chamfer - remove Chamfer
Shift + Back Chamfer does not remove anything, it only highlights found chamfers
Rebuild chamfer - after rollback, apply the Chamfer modifier to the model

Back TurboSmooth - remove TurboSmooth iterations from the model
After geometry change - rollback TurboSmooth even where the geometry has been edited after smoothing

Each press is one step Ctrl+Z.

When applying Back TurboSmooth, the following are transferred:
- Material ID and smoothing groups;
- all map channels: UV, vertex color, illumination, alpha. For each channel, the script determines whether TurboSmooth smoothed the coordinates or not.

Designed for 3ds Max 2010 and newer.