TSU-4049 part 2

src/Tsunami/Measurement/Common/Tsunami.cs

@@ -458,11 +458,9 @@ namespace TSU.Common
                 if (incomingTsunami.Version == null)
                     incomingTsunami.Version = R.T_PRE_1_0_XX;
 
-                if (incomingTsunami.Version == currentTsunami.Version)
-                {
                 currentTsunami.PathOfTheSavedFile = incomingTsunami.PathOfTheSavedFile;
-                }
-                else
+
+                if (incomingTsunami.Version != currentTsunami.Version)
                 {
                     string backUpPath = TSU.IO.Backup.Create(incomingTsunami.PathOfTheSavedFile, $"version {incomingTsunami.Version}", keepOriginalPlace: true);
 
@@ -486,6 +484,7 @@ namespace TSU.Common
                 currentTsunami.Points = incomingTsunami.Points;
                 currentTsunami.CompositeElements = incomingTsunami.CompositeElements;
                 currentTsunami.HiddenPoints = incomingTsunami.HiddenPoints;
+
                 foreach (M.Module item in incomingTsunami.MeasurementModules)
                 {
                     Tsunami2.Properties.Menu.BroadcastMessage($"Restarting {item._Name}");

src/Tsunami/Measurement/Common/TsunamiView.cs

@@ -208,7 +208,7 @@ namespace TSU.Common
                         this.menu.OpenExistingModules(file);
                     });
                 }
-                if (ext == ".INP" || ext == ".LGC")
+                else if (ext == ".INP" || ext == ".LGC")
                 {
                     RunInADifferentThreadToReleaseTheExplorerWindows(() =>
                     {
@@ -217,7 +217,7 @@ namespace TSU.Common
                 }
                 else
                 {
-                    new MessageInput(MessageType.Warning, "Only support '*.TSU' file for the moment").Show();
+                    new MessageInput(MessageType.Warning, "Only support '*.TSU; *.LGC; *.INP' file for the moment").Show();
                 }
             }
         }

src/Tsunami/Measurement/Polar/Station/View.cs

@@ -308,7 +308,7 @@ namespace TSU.Polar
                 // Retrieve the node that was dragged.
                 TreeNode draggedNode = (TsuNode)e.Data.GetData(typeof(TsuNode));
 
-                if (targetNode != null)
+                if (targetNode != null && draggedNode != null)
                 {
                     seperatorLine.Height = 3;
                     seperatorLine.Left = targetNode.Bounds.Left;