Substance 3D Modeler

I installed Beta .10.2 (latest download). I've been in 3D CGI for 20 years, and this app is just a fail!Basically nothing functions right. I don't where to begin. I used ZBrush, Mudbox, Maya, little bit of Blender Sculpt.  But Substance Modeler is a fail.I fail to see the logic in work flow. It should be simple, straightforward. Intuituve. Substance modeler is none of those.First issue  OBJ and FBX import does work with UNC server paths! Importing FBX or OBJ geometry results in nothing. Yep S3D tells me MeshImported, but the scene is empty. OR 'Invalid File Path' after selecting the geometry to import.  When importing from conventional letter paths , some OBJ and FBX geometry is brought in. Many simply report 'MeshImported" but the geometry is not in scene. When it does import the Y vertical axis (Maya, Houdini) is swapped with Z axis, resulting in incorrect alignment. Creating geometry from scratch.Weird head scratcher this is, when it should simple. What

There no info about this buttons in documentation. What are their function?