Hi,
Though there's not a built-in function, here are a couple of one-line maxscripts that might help.
To disable auto-build for all RC objects in the scene
for each in (for obj in geometry where classof obj == RailClone_Pro collect obj) do (each.autoUpdate=false;)
To enable auto-build for all RC objects in the scene
for each in (for obj in geometry where classof obj == RailClone_Pro collect obj) do (each.autoUpdate=true; redrawViews(); )
Hope that helps,
Paul