Tri2Quad is a simple and effective script for converting triangles into squares in Editable Poly.

Macroscript: Works in 3ds Max 2020 and newer.

Simple script via Run Script: compatible with 3ds Max 2012+.

Installing MZP: Drag the file into the 3ds Max window and restart the program. In Windows 11, icons may not load immediately. After restarting, go to the Elvis Gintsyak category and search for Tri2Quad.

Video demonstration:
https://www.youtube.com/watch?v=hr0R8sWKdoM&feature=youtu.be