diff --git a/invesalius/control.py b/invesalius/control.py
index 17688ca..6e1ee84 100644
--- a/invesalius/control.py
+++ b/invesalius/control.py
@@ -128,6 +128,11 @@ class Controller():
             answer = dialog.SaveChangesDialog2(filename)
             if answer:
                 self.ShowDialogSaveProject()
+            self.CloseProject()
+            #Publisher.sendMessage("Enable state project", False)
+            Publisher.sendMessage('Set project name')
+            Publisher.sendMessage("Stop Config Recording")
+            Publisher.sendMessage("Set slice interaction style", const.STATE_DEFAULT)
         # Import project
         dirpath = dialog.ShowImportDirDialog()
         if dirpath and not os.listdir(dirpath):
diff --git a/invesalius/data/slice_.py b/invesalius/data/slice_.py
index 6ff42b3..6f98659 100644
--- a/invesalius/data/slice_.py
+++ b/invesalius/data/slice_.py
@@ -246,6 +246,7 @@ class Slice(object):
 
             if (state == const.SLICE_STATE_EDITOR):
                 Publisher.sendMessage('Set interactor default cursor')
+            self.state = new_state
 
     def OnCloseProject(self, pubsub_evt):
         self.CloseProject()
@@ -258,9 +259,18 @@ class Slice(object):
         os.remove(f)
         self.current_mask = None
 
+        for name in self.aux_matrices:
+            m = self.aux_matrices[name]
+            f = m.filename
+            m._mmap.close()
+            m = None
+            os.remove(f)
+        self.aux_matrices = {}
+
         self.values = None
         self.nodes = None
         self.from_= OTHER
+        self.state = const.STATE_DEFAULT
 
         self.number_of_colours = 256
         self.saturation_range = (0, 0)
@@ -392,7 +402,7 @@ class Slice(object):
     def create_temp_mask(self):
         temp_file = tempfile.mktemp()
         shape = self.matrix.shape
-        matrix = numpy.memmap(temp_file, mode='w+', dtype='int8', shape=shape)
+        matrix = numpy.memmap(temp_file, mode='w+', dtype='uint8', shape=shape)
         return temp_file, matrix
 
     def edit_mask_pixel(self, operation, index, position, radius, orientation):
diff --git a/invesalius/gui/task_slice.py b/invesalius/gui/task_slice.py
index 4cafaa1..8183c2b 100644
--- a/invesalius/gui/task_slice.py
+++ b/invesalius/gui/task_slice.py
@@ -281,6 +281,7 @@ class InnerFoldPanel(wx.Panel):
     def __bind_pubsub_evt(self):
         Publisher.subscribe(self.OnRetrieveStyle, 'Retrieve task slice style')
         Publisher.subscribe(self.OnDisableStyle, 'Disable task slice style')
+        Publisher.subscribe(self.OnCloseProject, 'Close project data')
 
     def OnFoldPressCaption(self, evt):
         id = evt.GetTag().GetId()
@@ -317,6 +318,9 @@ class InnerFoldPanel(wx.Panel):
         if (self.last_style == const.SLICE_STATE_EDITOR):
             Publisher.sendMessage('Disable style', const.SLICE_STATE_EDITOR)
 
+    def OnCloseProject(self, pubsub_evt):
+        self.fold_panel.Expand(self.fold_panel.GetFoldPanel(0))
+
     def GetMaskSelected(self):
         x= self.mask_prop_panel.GetMaskSelected()
         return self.mask_prop_panel.GetMaskSelected()
@@ -758,13 +762,8 @@ class WatershedTool(EditionTools):
         line2.Add(combo_brush_op, 1, wx.EXPAND|wx.TOP|wx.RIGHT|wx.LEFT, 5)
 
         ## LINE 3
-        text_thresh = wx.StaticText(self, -1, _("Brush threshold range:"))
 
         ## LINE 4
-        gradient_thresh = grad.GradientCtrl(self, -1, 0, 5000, 0, 5000,
-                                       (0, 0, 255, 100))
-        self.gradient_thresh = gradient_thresh
-        self.bind_evt_gradient = True
 
         # LINE 5
         check_box = wx.CheckBox(self, -1, _("Overwrite mask"))
@@ -777,9 +776,6 @@ class WatershedTool(EditionTools):
         sizer = wx.BoxSizer(wx.VERTICAL)
         sizer.Add(text1, 0, wx.GROW|wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, 5)
         sizer.Add(line2, 0, wx.GROW|wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, 5)
-        sizer.Add(text_thresh, 0, wx.GROW|wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, 5)
-        sizer.Add(gradient_thresh, 0, wx.EXPAND|wx.TOP|wx.LEFT|wx.RIGHT|
-                  wx.BOTTOM, 6)
         sizer.Add(check_box, 0, wx.GROW|wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, 5)
         sizer.Add(self.btn_exp_watershed, 0, wx.GROW|wx.EXPAND|wx.LEFT|wx.RIGHT|wx.TOP, 5)
         sizer.Fit(self)
@@ -788,24 +784,15 @@ class WatershedTool(EditionTools):
         self.Update()
         self.SetAutoLayout(1)
 
-        self.__bind_events()
         self.__bind_events_wx()
 
 
     def __bind_events_wx(self):
         self.Bind(wx.EVT_MENU, self.OnMenu)
-        self.Bind(grad.EVT_THRESHOLD_CHANGED, self.OnGradientChanged,
-                  self.gradient_thresh)
         self.combo_brush_op.Bind(wx.EVT_COMBOBOX, self.OnComboBrushOp)
         self.check_box.Bind(wx.EVT_CHECKBOX, self.OnCheckOverwriteMask)
         self.btn_exp_watershed.Bind(wx.EVT_BUTTON, self.OnExpandWatershed)
 
-    def __bind_events(self):
-        Publisher.subscribe(self.SetThresholdBounds,
-                                        'Update threshold limits')
-        Publisher.subscribe(self.ChangeMaskColour, 'Change mask colour')
-        Publisher.subscribe(self.SetGradientColour, 'Add mask')
-
     def ChangeMaskColour(self, pubsub_evt):
         colour = pubsub_evt.data
         self.gradient_thresh.SetColour(colour)
@@ -830,13 +817,6 @@ class WatershedTool(EditionTools):
         self.gradient_thresh.SetMinValue(thresh_min)
         self.gradient_thresh.SetMaxValue(thresh_max)
 
-    def OnGradientChanged(self, evt):
-        thresh_min = self.gradient_thresh.GetMinValue()
-        thresh_max = self.gradient_thresh.GetMaxValue()
-        if self.bind_evt_gradient:
-            Publisher.sendMessage('Set edition threshold values',
-                                     (thresh_min, thresh_max))
-
     def OnMenu(self, evt):
         SQUARE_BMP = wx.Bitmap("../icons/brush_square.jpg", wx.BITMAP_TYPE_JPEG)
         CIRCLE_BMP = wx.Bitmap("../icons/brush_circle.jpg", wx.BITMAP_TYPE_JPEG)
--
libgit2 0.21.2