diff --git a/MedSAM/MedSAMLite/MedSAMLite.py b/MedSAM/MedSAMLite/MedSAMLite.py
index f9e31a1..873ab24 100644
--- a/MedSAM/MedSAMLite/MedSAMLite.py
+++ b/MedSAM/MedSAMLite/MedSAMLite.py
@@ -33,8 +33,7 @@
 try:
     from numpysocket import NumpySocket
 except:
-    slicer.util.pip_install('numpysocket')
-    from numpysocket import NumpySocket
+    pass # no installation anymore, shorter plugin load
 
 #
 # MedSAMLite
@@ -167,11 +166,12 @@ def setup(self) -> None:
         # Create logic class. Logic implements all computations that should be possible to run
         # in batch mode, without a graphical user interface.
         self.logic = MedSAMLiteLogic()
+        self.logic.widget = self
 
         DEPENDENCIES_AVAILABLE = False
 
         # Initial Dependency Setup
-        if os.path.isfile('medsam_info') and os.path.isfile(os.path.join(open('medsam_info', 'r').read(), 'server_essentials/server.py')):
+        if self.is_setting_available():
             try:
                 from segment_anything.modeling import MaskDecoder
                 DEPENDENCIES_AVAILABLE = True
@@ -199,7 +199,7 @@ def setup(self) -> None:
             
             return
         
-        self.logic.server_dir = os.path.join(open('medsam_info', 'r').read(), 'server_essentials')
+        self.logic.server_dir = os.path.join(self.read_setting(), 'server_essentials')
 
         # Load widget from .ui file (created by Qt Designer).
         # Additional widgets can be instantiated manually and added to self.layout.
@@ -218,6 +218,7 @@ def setup(self) -> None:
         # print(self.ui.clbtnOperation.layout().__dict__)
         self.ui.clbtnOperation.layout().addWidget(self.editor)
         # self.layout.addWidget(self.editor)
+        # self.editor.currentSegmentIDChanged.connect(print)
         ############################################################################
 
         # Set scene in MRML widgets. Make sure that in Qt designer the top-level qMRMLWidget's
@@ -355,6 +356,29 @@ def setParameterNode(self, inputParameterNode: Optional[MedSAMLiteParameterNode]
             # Note: in the .ui file, a Qt dynamic property called "SlicerParameterName" is set on each
             # ui element that needs connection.
             self._parameterNodeGuiTag = self._parameterNode.connectGui(self.ui)
+        
+    def is_setting_available(self):
+        if not (os.path.isfile('.medsam_info') or os.path.isfile(os.path.expanduser('~/.medsam_info'))):
+            return False
+
+        setting_file = '.medsam_info' if os.path.isfile('.medsam_info') else os.path.expanduser('~/.medsam_info')
+        server_file = os.path.join(self.read_setting(), 'server_essentials/server.py')
+
+        return os.path.isfile(server_file)
+    
+    def read_setting(self):
+        setting_file = '.medsam_info' if os.path.isfile('.medsam_info') else os.path.expanduser('~/.medsam_info')
+        with open(setting_file, 'r') as settings:
+            server_essentials_root = settings.read()
+            return server_essentials_root
+
+    def write_setting(self, setting):
+        try:
+            with open('.medsam_info', 'w') as settings:
+                settings.write(setting)
+        except:
+            with open(os.path.expanduser('~/.medsam_info'), 'w') as settings:
+                settings.write(setting)
 
 
 #
@@ -378,6 +402,7 @@ class MedSAMLiteLogic(ScriptedLoadableModuleLogic):
     timer = None
     progressbar = None
     server_dir = None
+    widget = None
 
     def __init__(self) -> None:
         """
@@ -432,7 +457,7 @@ def pip_install_wrapper(self, command, event):
     def download_wrapper(self, url, filename, event):
         with urlopen(url) as r:
             # self.setTotalProgress.emit(int(r.info()["Content-Length"]))
-            with open(filename, "ab") as f:
+            with open(filename, "wb") as f:
                 while True:
                     chunk = r.read(1024)
                     if chunk is None:
@@ -452,8 +477,7 @@ def install_dependencies(self, ctk_path):
             return
         
         print('Installation will happen in %s'%ctk_path.currentPath)
-        with open('medsam_info', 'w') as fp:
-            fp.write(ctk_path.currentPath)
+        self.widget.write_setting(ctk_path.currentPath)
         
         file_url = 'https://github.com/rasakereh/medsam-3dslicer/raw/master/server_essentials.zip'
         filename = os.path.join(ctk_path.currentPath, 'server_essentials.zip')
@@ -467,7 +491,7 @@ def install_dependencies(self, ctk_path):
             'Numpy Socket': 'numpysocket',
             'FastAPI': 'fastapi',
             'Uvicorn': 'uvicorn',
-            'MedSam Lite Server': '-e %s'%(self.server_dir)
+            'MedSam Lite Server': '-e "%s"'%(self.server_dir)
         }
 
         for dependency in dependencies:
@@ -595,10 +619,14 @@ def showSegmentation(self, segmentation_mask):
         segment_volume = slicer.mrmlScene.AddNewNodeByClass("vtkMRMLLabelMapVolumeNode")
         slicer.modules.segmentations.logic().ExportAllSegmentsToLabelmapNode(loaded_seg_file, segment_volume, slicer.vtkSegmentation.EXTENT_REFERENCE_GEOMETRY)
 
-        if self.segment_res_group is None:
-          self.segment_res_group = slicer.mrmlScene.AddNewNodeByClass("vtkMRMLSegmentationNode")
-          self.segment_res_group.SetReferenceImageGeometryParameterFromVolumeNode(self.volume_node)
-        slicer.modules.segmentations.logic().ImportLabelmapToSegmentationNode(segment_volume, self.segment_res_group)
+        current_seg_group = self.widget.editor.segmentationNode()
+        if current_seg_group is None:
+            if self.segment_res_group is None:
+                self.segment_res_group = slicer.mrmlScene.AddNewNodeByClass("vtkMRMLSegmentationNode")
+                self.segment_res_group.SetReferenceImageGeometryParameterFromVolumeNode(self.volume_node)
+            current_seg_group = self.segment_res_group
+
+        slicer.modules.segmentations.logic().ImportLabelmapToSegmentationNode(segment_volume, current_seg_group)
         slicer.mrmlScene.RemoveNode(segment_volume)
         slicer.mrmlScene.RemoveNode(loaded_seg_file)
     
diff --git a/server/server.py b/server/server.py
index a60fe9e..67e434a 100644
--- a/server/server.py
+++ b/server/server.py
@@ -66,7 +66,7 @@ def medsam_inference(medsam_model, img_embed, box_1024, height, width):
 PARENT_DIR = os.path.dirname(os.path.abspath(__file__))
 MedSAM_CKPT_PATH = os.path.join(PARENT_DIR , "medsam_lite.pth")
 MEDSAM_IMG_INPUT_SIZE = 1024
-device = 'cpu'#torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
+device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
 
 H, W = None, None
 image = None
@@ -260,6 +260,8 @@ def get_image(wmin: int, wmax: int):
 
 def get_bbox1024(mask_1024, bbox_shift=3):
     y_indices, x_indices = np.where(mask_1024 > 0)
+    if x_indices.shape[0] == 0:
+        return np.array([0, 0, bbox_shift, bbox_shift])
     x_min, x_max = np.min(x_indices), np.max(x_indices)
     y_min, y_max = np.min(y_indices), np.max(y_indices)
     # add perturbation to bounding box coordinates
diff --git a/server_essentials.zip b/server_essentials.zip
index a3cad2f..a8698f4 100644
Binary files a/server_essentials.zip and b/server_essentials.zip differ