Modo 14.0v2 docs:

Unbevel

Unbevel collapses beveled faces, created by Edge Bevel or Edge Chamfer, between two selected edge loops.

To use the tool:

In Edges selection mode, select the two edge loops that surround the faces you want to unbevel:
In the modeling toolbar, click the Edge sub-tab, and click Unbevel.
A dialog prompts you to select the Unbevel Mode. You have the following three options:
Convergence
Collapses beveled polygons into sharp edges.
Flat
Turns beveled polygons into a single flat polygon.
Square
Removes beveled polygons and creates square ones.

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Modo 14.0v2 docs:

Convergence	Collapses beveled polygons into sharp edges.
Flat	Turns beveled polygons into a single flat polygon.
Square	Removes beveled polygons and creates square ones.