We don't generally allow data to be entered via tables in Ram Concept. A colleague of mine wrote a excel macro tool to allow users to input some data directly, but I don't think it will work for point springs.
The biggest issue is that all of the finite element model information always gets regenerated when meshing the model, so even if you could override the spring values it would only last until the model is re-meshed.
What's the circumstance that requires these changes? Are we talking about the resulting spring stiffness form an area spring, or were point springs modeled on the mesh input layer here?