No. The remesh creates a new object (for example Body_STP) unless Replace Original is on, and even then the old mesh is kept so Restore brings it back. Topology Tools work in Edit Mode with normal undo.

Yes. UV maps, materials, vertex groups, every shape key, shape-key drivers, the parent and Armature modifiers are rebuilt on the result automatically.

Yes. Select faces in Edit Mode and press Remesh Selection. Only those faces are rebuilt and stitched into the rest; faces outside the selection never move.

Blender 4.2 to 5.2 on Windows, macOS and Linux. Every feature works on every platform: the Smart Topology engine is pure Python and runs in Blender's own Python, so there is nothing extra to install.

Blender's Voxel Remesh makes a uniform grid with no edge flow, and QuadriFlow does not carry UVs, weights or shape keys over. Smart Topology Pro produces flowing all-quad topology, preserves volume, follows the rig and keeps your data.