diff --git a/EduNetworkBuilder/NetworkBuilder.cs b/EduNetworkBuilder/NetworkBuilder.cs
index a9588d7..d2ff8ed 100644
--- a/EduNetworkBuilder/NetworkBuilder.cs
+++ b/EduNetworkBuilder/NetworkBuilder.cs
@@ -532,7 +532,7 @@ namespace EduNetworkBuilder
 
         public void UpdateMenu()
         {
-            if (myNetwork.NetworkFilename != "")
+            if (myNetwork.NetworkFilename != "" || storedNetworkStates.Count > 0)
             {
                 reloadToolStripMenuItem.Enabled = true;
             }
@@ -2032,6 +2032,17 @@ namespace EduNetworkBuilder
                 PrepForLoad();
                 myNetwork.Load(oldfile);
             }
+            else
+            {
+                if(storedNetworkStates.Count > 0)
+                {                    
+                    Network theNet = storedNetworkStates[storedNetworkStates.Count -1];
+                    storedNetworkStates.Clear();
+                    ForwardstoredNetworkStates.Clear();
+                    PrepForLoad();
+                    LoadNetworkFromNetwork(theNet);
+                }
+            }
             UpdateMenu();
             UpdateForm();
         }
@@ -2189,6 +2200,7 @@ namespace EduNetworkBuilder
             xmlDoc.LoadXml(myString);
             PrepForLoad();
             myNetwork.Load(xmlDoc, resource, true, SkipOpeningWindows);//Load it from resource.  Set the bool saying it was from resource
+            StoreNetworkState(myNetwork); //Store a clean state
             UpdateMenu();
             UpdateForm();
         }
@@ -2205,6 +2217,7 @@ namespace EduNetworkBuilder
                 UpdateLinks();
                 UpdateForm();
                 NBSettings ns = NB.GetSettings();
+                StoreNetworkState(myNetwork); //Store a clean state
                 if (ns != null && ns.AutoDHCPAllMachinesAtNetworkLoad)
                     myNetwork.DoAllDHCP();
             }
@@ -2212,7 +2225,9 @@ namespace EduNetworkBuilder
 
         private void LoadSolvedResource(string what)
         {
+            PrepForLoad();
             LoadNetworkFromResource(what);
+            StoreNetworkState(myNetwork); //Store a clean state
             myNetwork.OverrideFromResources();
             UpdateForm();
             UpdateMessages();
@@ -2225,6 +2240,7 @@ namespace EduNetworkBuilder
             //Then "unsolve" it
             myNetwork.DoAllClearIPs();
             myNetwork.OverrideFromResources();
+            StoreNetworkState(myNetwork); //Store a clean state
             UpdateForm();
             UpdateMessages();
         }