diff --git a/prism/src/prism/Prism.java b/prism/src/prism/Prism.java
index 3bb48e0c..9bdc1ca7 100644
--- a/prism/src/prism/Prism.java
+++ b/prism/src/prism/Prism.java
@@ -39,7 +39,7 @@ import simulator.*;
 // prism class - main class for model checker
 // (independent of user interface (command line or gui))
 
-public class Prism
+public class Prism implements PrismSettingsListener
 {
 	// prism version
 	private static final String version = "3.0";
@@ -143,6 +143,23 @@ public class Prism
 		
 		// set up some default options
 		settings = new PrismSettings();
+		// load user's default settings
+		try {
+			settings.loadSettingsFile();
+		}
+		catch(PrismException e) {
+			// if there were no user defaults to load, create them
+			try
+			{
+				settings.saveSettingsFile();
+			}
+			catch(PrismException ex)
+			{
+				System.err.println("Warning: Failed to create new PRISM settings file.");
+			}
+		}
+		// add this Prism object as a listener
+		settings.addSettingsListener(this);
 		
 		// default values for miscellaneous options 
 		doReach = true;
@@ -235,20 +252,11 @@ public class Prism
 	public void setCUDDMaxMem(int i) throws PrismException
 	{
 		settings.set(PrismSettings.PRISM_CUDD_MAX_MEM, i);
-		if (cuddStarted)
-		{
-			JDD.SetCUDDMaxMem(settings.getInteger(PrismSettings.PRISM_CUDD_MAX_MEM));
-		}
 	}
 	
 	public void setCUDDEpsilon(double d) throws PrismException
 	{
 		settings.set(PrismSettings.PRISM_CUDD_EPSILON, d);
-		
-		if (cuddStarted)
-		{
-			JDD.SetCUDDEpsilon(settings.getDouble(PrismSettings.PRISM_CUDD_EPSILON));
-		}
 	}
 	
 	public void setNumSBLevels(int i) throws PrismException
@@ -431,6 +439,17 @@ public class Prism
 		return theSimulator; 
 	}
 
+	// Let PrismSettings object notify us things have changed
+	
+	public void notifySettings(PrismSettings settings)
+	{
+		if (cuddStarted)
+		{
+			JDD.SetCUDDEpsilon(settings.getDouble(PrismSettings.PRISM_CUDD_EPSILON));
+			JDD.SetCUDDMaxMem(settings.getInteger(PrismSettings.PRISM_CUDD_MAX_MEM));
+		}
+	}
+
 	// initialise
 	
 	public void initialise() throws PrismException
diff --git a/prism/src/userinterface/GUIPrism.java b/prism/src/userinterface/GUIPrism.java
index 40518860..24be46f2 100644
--- a/prism/src/userinterface/GUIPrism.java
+++ b/prism/src/userinterface/GUIPrism.java
@@ -80,7 +80,6 @@ public class GUIPrism extends JFrame
             splash.display();
             //new GUIPrismSplash().show();
             gui = new GUIPrism();
-            gui.importOptions();
             gui.show();
             EventQueue.invokeLater(new GUIPrism.SplashScreenCloser());
             gui.passCLArgs(args);
@@ -153,28 +152,6 @@ public class GUIPrism extends JFrame
         
     }
     
-    public void importOptions()
-    {
-        //options.readFromConfigFile();
-        //options.readFromPropertiesFile();
-        try
-        {
-            prism.getSettings().loadSettingsFile();
-        }
-        catch(PrismException e)
-        {
-            try
-            {
-                prism.getSettings().saveSettingsFile();
-                setTaskBarText("No PRISM settings file found. A new file was created using default values.");
-            }
-            catch(PrismException ex)
-            {
-                setTaskBarText("Warning: Failed to create new PRISM settings file.");
-            }
-        }
-    }
-    
     /**
      *  Sets the URL for images properly, so that they are loaded from the
      *  correct directory.  This also loads in all of the resouces for