Need Help With Kiri Engine

I used kiri engine to make a 3D file. I import it using the kiri enginer addon in blender, which is a .ply file. I modify it how I want it in blender, but can’t seem to export it as an FBX or OBJ file with textures. Please if someone could help me understand how to do it. Their tutorials and documentation have nothing on exporting for those files. Thanks!