diff --git a/scripts/dna_viewer/ui/app.py b/scripts/dna_viewer/ui/app.py
index 64342c1..1ff38d2 100644
--- a/scripts/dna_viewer/ui/app.py
+++ b/scripts/dna_viewer/ui/app.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
 import logging
 import os
 import webbrowser
@@ -37,7 +40,6 @@ def show() -> None:
 
 WINDOW_OBJECT = "dnaviewer"
 WINDOW_TITLE = "DNA Viewer"
-HELP_URL = "https://epicgames.github.io/MetaHuman-DNA-Calibration/"
 SPACING = 6
 WINDOW_SIZE_WIDTH_MIN = 800
 WINDOW_SIZE_WIDTH_MAX = 1200
@@ -55,6 +57,58 @@ MARGIN_BODY_LEFT = 0
 MARGIN_BODY_TOP = 0
 MARGIN_BODY_RIGHT = 0
 
+#===================================== CONSTANTS =====================================
+# Tool info
+TOOL_NAME = "MetaFusion"
+TOOL_VERSION = "Beta v1.0.0"
+TOOL_AUTHOR = "Virtuos"
+# UI Constants
+TOOL_WSCL_NAME = "MetaFusionWorkSpaceControl"
+HELP_URL = f"http://10.72.61.59:3000/ArtGroup/{TOOL_NAME}/wiki"
+DEFAULT_WINDOW_SIZE = (450, 800)
+
+# Paths
+TOOL_PATH = os.path.dirname(os.path.dirname(os.path.abspath(__file__))).replace("\\", "/")
+SCRIPTS_PATH = os.path.join(TOOL_PATH, "scripts").replace("\\", "/")
+ICONS_PATH = os.path.join(TOOL_PATH, "icons").replace("\\", "/")
+TOOL_ICON = os.path.join(ICONS_PATH, "logo.png").replace("\\", "/")
+
+# Metahuman paths
+DATA_PATH = os.path.join(TOOL_PATH, "data").replace("\\", "/")
+DNA_PATH = os.path.join(DATA_PATH, "dna").replace("\\", "/")
+BODY_PATH = os.path.join(DATA_PATH, "body").replace("\\", "/")
+IMG_PATH = os.path.join(DATA_PATH, "img").replace("\\", "/")
+MAP_PATH = os.path.join(DATA_PATH, "map").replace("\\", "/")
+MASKS_PATH = os.path.join(DATA_PATH, "masks").replace("\\", "/")
+SHADERS_PATH = os.path.join(DATA_PATH, "shaders").replace("\\", "/")
+MH4_PATH = os.path.join(DATA_PATH, "mh4").replace("\\", "/")
+MH4_DNA_PATH = os.path.join(MH4_PATH, "dna").replace("\\", "/")
+OUT_PATH = os.path.join(DATA_PATH, "out").replace("\\", "/")
+SAVE_PATH = os.path.join(DATA_PATH, "save").replace("\\", "/")
+MAYA_VERSION = cmds.about(version=True)
+PLUGIN_PATH = os.path.join(TOOL_PATH, "plugins", f"{MAYA_VERSION}").replace("\\", "/")
+if not os.path.exists(PLUGIN_PATH):
+    cmds.warning(f"Plugin path not found: {PLUGIN_PATH}")
+
+GUI_PATH = os.path.join(DATA_PATH, "source", "gui.ma").replace("\\", "/")
+ANALOG_GUI_PATH = os.path.join(DATA_PATH, "source", "analog_gui.ma").replace("\\", "/")
+AAS_PATH = os.path.join(DATA_PATH, "source", "additional_assemble_script.py").replace("\\", "/")
+
+print(f"TOOL_PATH: {TOOL_PATH}")
+print(f"SCRIPTS_PATH: {SCRIPTS_PATH}")
+print(f"ICONS_PATH: {ICONS_PATH}")
+print(f"TOOL_ICON: {TOOL_ICON}")
+print(f"DATA_PATH: {DATA_PATH}")
+print(f"DNA_PATH: {DNA_PATH}")
+print(f"BODY_PATH: {BODY_PATH}")
+print(f"IMG_PATH: {IMG_PATH}")
+print(f"MAP_PATH: {MAP_PATH}")
+print(f"MASKS_PATH: {MASKS_PATH}")
+print(f"SHADERS_PATH: {SHADERS_PATH}")
+print(f"GUI_PATH: {GUI_PATH}")
+print(f"ANALOG_GUI_PATH: {ANALOG_GUI_PATH}")
+print(f"AAS_PATH: {AAS_PATH}")
+
 
 class MeshTreeList(QWidget):
     """