Re-import asset without losing work?

I created a scene in MAX with many objects and exported it to UE4 through fbx export/import. Now it I want to update any one object in MAX and re import in UE, all the objects are re imported as one object. My workaround so far is the select the modified objects in MAX and export only selected objects as one fbx file. Then import it in UE.
I haven’t tried “Auto Re import” yet.