Mesh Tool - A Mesh Editor

hi ,
I have imported some geometry from rhino3d to UE4 using datasmith.
The geometry shows up in UE4 as a Static Mesh Actor.
I would like to assign a floor material as shown above.
With your MESH_TOOL could I ust select the area (highlighted blue) and assign a UE4 material?

It would be great if I could send you the file to test it before I purchase the mesh tool?

Kind regards,

Chris