No cleaning up necessary, just drop your models into the scene and start rendering. No special plugin needed to open scene. HDRI & scene not included. A good quality product to enhance you scene or project.
This is a 3d model of Almirah made in CAD Software. It is a low poly model with a little bit of Material on it. Five files are given .blend, .stl, .MTL, .fbx and .obj. And if you get any problem regarding the file then let me know, I will try to fix it.