diff --git a/__init__.py b/__init__.py
index b92efef..debc775 100644
--- a/__init__.py
+++ b/__init__.py
@@ -410,69 +410,69 @@ def register():
     for cls in classes:
         bpy.utils.register_class(cls)
 
-    bpy.types.Scene.subrect_atlas = bpy.props.PointerProperty (name="atlas",type=bpy.types.Object,description="atlas object")
-    bpy.types.Scene.uv_box = bpy.props.PointerProperty (name="uvbox",type=bpy.types.Object,description="uv box")
-    bpy.types.Scene.trim_atlas = bpy.props.PointerProperty (name="trim_atlas",type=bpy.types.Object,description="trim atlas")
-    bpy.types.Scene.trim_index = bpy.props.IntProperty (name = "trim_index",default = 0,description = "trim index")
-    bpy.types.Scene.cap_index = bpy.props.IntProperty (name = "cap_index",default = 0,description = "cap index")
-    bpy.types.Scene.duv_trimuseinset = bpy.props.BoolProperty (name = "duv_trimuseinset",default = False,description = "Use inset when trimming")
-    bpy.types.Scene.uvinsetpixels = bpy.props.FloatProperty (name = "uv inset pixel amount",default = 1.0,description = "")
-    bpy.types.Scene.uvinsettexsize = bpy.props.FloatProperty (name = "uv inset texture size",default = 1024.0,description = "")
-    bpy.types.Scene.uvtransferxmin = bpy.props.FloatProperty (name = "uvtransferxmin",default = 0.0,description = "uv left bottom corner X")
-    bpy.types.Scene.uvtransferymin = bpy.props.FloatProperty (name = "uvtransferymin",default = 0.0,description = "uv left bottom corner Y")
-    bpy.types.Scene.uvtransferxmax = bpy.props.FloatProperty (name = "uvtransferxmax",default = 1.0,description = "uv right top corner X")
-    bpy.types.Scene.uvtransferymax = bpy.props.FloatProperty (name = "uvtransferymax",default = 1.0,description = "uv right top corner Y")
-    bpy.types.Scene.duv_useorientation = bpy.props.BoolProperty (name = "duv_useorientation",default = False,description = "Align UVs with world orientation")
-    bpy.types.Scene.duv_usemirrorx = bpy.props.BoolProperty (name = "duv_usemirrorx",default = True,description = "Randomly mirror faces on the x-axis")
-    bpy.types.Scene.duv_usemirrory = bpy.props.BoolProperty (name = "duv_usemirrory",default = True,description = "Randomly mirror faces on the y-axis")
-    bpy.types.Scene.duvhotspotscale = bpy.props.FloatProperty (name = "duvhotspotscale",default = 1.0,description = "Hotspotting scale multiplier")
-    bpy.types.Scene.duv_hotspotmaterial = bpy.props.PointerProperty (name="duv_hotspotmaterial",type=bpy.types.Material,poll=poll_material,description="Hotspot material")
-    bpy.types.Scene.duv_hotspotuseinset = bpy.props.BoolProperty (name = "duv_hotspotuseinset",default = False,description = "Use inset when hotspotting")
-    bpy.types.Scene.hotspotinsetpixels = bpy.props.FloatProperty (name = "hotspot inset pixel amount",default = 1.0,description = "")
-    bpy.types.Scene.hotspotinsettexsize = bpy.props.FloatProperty (name = "hotspot texture size",default = 1024.0,description = "")
-    bpy.types.Scene.duv_experimentaltools = bpy.props.BoolProperty (name = "duv_experimentaltools",default = False,description = "Show experimental tools")
-    bpy.types.Scene.duv_uv2copy = bpy.props.BoolProperty (name = "duv_uv2copy",default = False,description = "Copy uv2")
-    bpy.types.Scene.duv_hotspot_uv1 = bpy.props.BoolProperty (name = "duv_hotspot_uv1",default = False,description = "Always hotspot UV 1")
-    bpy.types.Scene.duv_hotspot_uv2 = bpy.props.BoolProperty (name = "duv_hotspot_uv2",default = False,description = "Always hotspot UV 2")
-    bpy.types.Scene.duv_boxmap_uv1 = bpy.props.BoolProperty (name = "duv_boxmap_uv1",default = False,description = "Always box map UV 1")
-    bpy.types.Scene.duv_boxmap_uv2 = bpy.props.BoolProperty (name = "duv_boxmap_uv2",default = False,description = "Always box map UV 2")
-    bpy.types.Scene.duv_autoboxmap = bpy.props.BoolProperty (name = "duv_autoboxmap",default = False,description = "Auto apply boxmap after hotspot operation")
-    bpy.types.Scene.duv_trimcap_uv1 = bpy.props.BoolProperty (name = "duv_trimcap_uv1",default = False,description = "Always apply trim/cap to UV 1")
-    bpy.types.Scene.duv_trimcap_uv2 = bpy.props.BoolProperty (name = "duv_trimcap_uv2",default = False,description = "Always apply trim/cap to UV 2")
-    bpy.types.Scene.duv_autoboxmaptrim = bpy.props.BoolProperty (name = "duv_autoboxmaptrim",default = False,description = "Auto apply boxmap after trim/cap operation")
-    bpy.types.Scene.duv_uvtrim_randomshift = bpy.props.BoolProperty (name = "duv_uvtrim_randomshift",default = False,description = "Randomize trim position along tiling axis")
-    bpy.types.Scene.duv_uvtrim_bounds = bpy.props.BoolProperty (name = "duv_uvtrim_bounds",default = False,description = "Scale trim to boundary region")
-    bpy.types.Scene.duv_uvtrim_min = bpy.props.FloatProperty (name = "duv_uvtrim_min",default = 0.0,description = "Boundary start")
-    bpy.types.Scene.duv_uvtrim_max = bpy.props.FloatProperty (name = "duv_uvtrim_max",default = 1.0,description = "Boundary end")
+    bpy.types.WindowManager.subrect_atlas = bpy.props.PointerProperty (name="atlas",type=bpy.types.Object,description="atlas object")
+    bpy.types.WindowManager.uv_box = bpy.props.PointerProperty (name="uvbox",type=bpy.types.Object,description="uv box")
+    bpy.types.WindowManager.trim_atlas = bpy.props.PointerProperty (name="trim_atlas",type=bpy.types.Object,description="trim atlas")
+    bpy.types.WindowManager.trim_index = bpy.props.IntProperty (name = "trim_index",default = 0,description = "trim index")
+    bpy.types.WindowManager.cap_index = bpy.props.IntProperty (name = "cap_index",default = 0,description = "cap index")
+    bpy.types.WindowManager.duv_trimuseinset = bpy.props.BoolProperty (name = "duv_trimuseinset",default = False,description = "Use inset when trimming")
+    bpy.types.WindowManager.uvinsetpixels = bpy.props.FloatProperty (name = "uv inset pixel amount",default = 1.0,description = "")
+    bpy.types.WindowManager.uvinsettexsize = bpy.props.FloatProperty (name = "uv inset texture size",default = 1024.0,description = "")
+    bpy.types.WindowManager.uvtransferxmin = bpy.props.FloatProperty (name = "uvtransferxmin",default = 0.0,description = "uv left bottom corner X")
+    bpy.types.WindowManager.uvtransferymin = bpy.props.FloatProperty (name = "uvtransferymin",default = 0.0,description = "uv left bottom corner Y")
+    bpy.types.WindowManager.uvtransferxmax = bpy.props.FloatProperty (name = "uvtransferxmax",default = 1.0,description = "uv right top corner X")
+    bpy.types.WindowManager.uvtransferymax = bpy.props.FloatProperty (name = "uvtransferymax",default = 1.0,description = "uv right top corner Y")
+    bpy.types.WindowManager.duv_useorientation = bpy.props.BoolProperty (name = "duv_useorientation",default = False,description = "Align UVs with world orientation")
+    bpy.types.WindowManager.duv_usemirrorx = bpy.props.BoolProperty (name = "duv_usemirrorx",default = True,description = "Randomly mirror faces on the x-axis")
+    bpy.types.WindowManager.duv_usemirrory = bpy.props.BoolProperty (name = "duv_usemirrory",default = True,description = "Randomly mirror faces on the y-axis")
+    bpy.types.WindowManager.duvhotspotscale = bpy.props.FloatProperty (name = "duvhotspotscale",default = 1.0,description = "Hotspotting scale multiplier")
+    bpy.types.WindowManager.duv_hotspotmaterial = bpy.props.PointerProperty (name="duv_hotspotmaterial",type=bpy.types.Material,poll=poll_material,description="Hotspot material")
+    bpy.types.WindowManager.duv_hotspotuseinset = bpy.props.BoolProperty (name = "duv_hotspotuseinset",default = False,description = "Use inset when hotspotting")
+    bpy.types.WindowManager.hotspotinsetpixels = bpy.props.FloatProperty (name = "hotspot inset pixel amount",default = 1.0,description = "")
+    bpy.types.WindowManager.hotspotinsettexsize = bpy.props.FloatProperty (name = "hotspot texture size",default = 1024.0,description = "")
+    bpy.types.WindowManager.duv_experimentaltools = bpy.props.BoolProperty (name = "duv_experimentaltools",default = False,description = "Show experimental tools")
+    bpy.types.WindowManager.duv_uv2copy = bpy.props.BoolProperty (name = "duv_uv2copy",default = False,description = "Copy uv2")
+    bpy.types.WindowManager.duv_hotspot_uv1 = bpy.props.BoolProperty (name = "duv_hotspot_uv1",default = False,description = "Always hotspot UV 1")
+    bpy.types.WindowManager.duv_hotspot_uv2 = bpy.props.BoolProperty (name = "duv_hotspot_uv2",default = False,description = "Always hotspot UV 2")
+    bpy.types.WindowManager.duv_boxmap_uv1 = bpy.props.BoolProperty (name = "duv_boxmap_uv1",default = False,description = "Always box map UV 1")
+    bpy.types.WindowManager.duv_boxmap_uv2 = bpy.props.BoolProperty (name = "duv_boxmap_uv2",default = False,description = "Always box map UV 2")
+    bpy.types.WindowManager.duv_autoboxmap = bpy.props.BoolProperty (name = "duv_autoboxmap",default = False,description = "Auto apply boxmap after hotspot operation")
+    bpy.types.WindowManager.duv_trimcap_uv1 = bpy.props.BoolProperty (name = "duv_trimcap_uv1",default = False,description = "Always apply trim/cap to UV 1")
+    bpy.types.WindowManager.duv_trimcap_uv2 = bpy.props.BoolProperty (name = "duv_trimcap_uv2",default = False,description = "Always apply trim/cap to UV 2")
+    bpy.types.WindowManager.duv_autoboxmaptrim = bpy.props.BoolProperty (name = "duv_autoboxmaptrim",default = False,description = "Auto apply boxmap after trim/cap operation")
+    bpy.types.WindowManager.duv_uvtrim_randomshift = bpy.props.BoolProperty (name = "duv_uvtrim_randomshift",default = False,description = "Randomize trim position along tiling axis")
+    bpy.types.WindowManager.duv_uvtrim_bounds = bpy.props.BoolProperty (name = "duv_uvtrim_bounds",default = False,description = "Scale trim to boundary region")
+    bpy.types.WindowManager.duv_uvtrim_min = bpy.props.FloatProperty (name = "duv_uvtrim_min",default = 0.0,description = "Boundary start")
+    bpy.types.WindowManager.duv_uvtrim_max = bpy.props.FloatProperty (name = "duv_uvtrim_max",default = 1.0,description = "Boundary end")
     
-    bpy.types.Scene.subrect_atlas1 = bpy.props.PointerProperty (name="atlas1",type=bpy.types.Object,description="atlas1")
-    bpy.types.Scene.subrect_atlas2 = bpy.props.PointerProperty (name="atlas2",type=bpy.types.Object,description="atlas2")
-    bpy.types.Scene.subrect_atlas3 = bpy.props.PointerProperty (name="atlas3",type=bpy.types.Object,description="atlas3")
-    bpy.types.Scene.subrect_atlas4 = bpy.props.PointerProperty (name="atlas4",type=bpy.types.Object,description="atlas4")
-    bpy.types.Scene.subrect_atlas5 = bpy.props.PointerProperty (name="atlas5",type=bpy.types.Object,description="atlas5")
-    bpy.types.Scene.subrect_atlas6 = bpy.props.PointerProperty (name="atlas6",type=bpy.types.Object,description="atlas6")
-    bpy.types.Scene.subrect_atlas7 = bpy.props.PointerProperty (name="atlas7",type=bpy.types.Object,description="atlas7")
-    bpy.types.Scene.subrect_atlas8 = bpy.props.PointerProperty (name="atlas8",type=bpy.types.Object,description="atlas8")
-
-    bpy.types.Scene.duv_hotspotmaterial1 = bpy.props.PointerProperty (name="duv_hotspotmaterial1",type=bpy.types.Material,poll=poll_material,description="Hotspot material 1")
-    bpy.types.Scene.duv_hotspotmaterial2 = bpy.props.PointerProperty (name="duv_hotspotmaterial2",type=bpy.types.Material,poll=poll_material,description="Hotspot material 2")
-    bpy.types.Scene.duv_hotspotmaterial3 = bpy.props.PointerProperty (name="duv_hotspotmaterial3",type=bpy.types.Material,poll=poll_material,description="Hotspot material 3")
-    bpy.types.Scene.duv_hotspotmaterial4 = bpy.props.PointerProperty (name="duv_hotspotmaterial4",type=bpy.types.Material,poll=poll_material,description="Hotspot material 4")
-    bpy.types.Scene.duv_hotspotmaterial5 = bpy.props.PointerProperty (name="duv_hotspotmaterial5",type=bpy.types.Material,poll=poll_material,description="Hotspot material 5")
-    bpy.types.Scene.duv_hotspotmaterial6 = bpy.props.PointerProperty (name="duv_hotspotmaterial6",type=bpy.types.Material,poll=poll_material,description="Hotspot material 6")
-    bpy.types.Scene.duv_hotspotmaterial7 = bpy.props.PointerProperty (name="duv_hotspotmaterial7",type=bpy.types.Material,poll=poll_material,description="Hotspot material 7")
-    bpy.types.Scene.duv_hotspotmaterial8 = bpy.props.PointerProperty (name="duv_hotspotmaterial8",type=bpy.types.Material,poll=poll_material,description="Hotspot material 8")
+    bpy.types.WindowManager.subrect_atlas1 = bpy.props.PointerProperty (name="atlas1",type=bpy.types.Object,description="atlas1")
+    bpy.types.WindowManager.subrect_atlas2 = bpy.props.PointerProperty (name="atlas2",type=bpy.types.Object,description="atlas2")
+    bpy.types.WindowManager.subrect_atlas3 = bpy.props.PointerProperty (name="atlas3",type=bpy.types.Object,description="atlas3")
+    bpy.types.WindowManager.subrect_atlas4 = bpy.props.PointerProperty (name="atlas4",type=bpy.types.Object,description="atlas4")
+    bpy.types.WindowManager.subrect_atlas5 = bpy.props.PointerProperty (name="atlas5",type=bpy.types.Object,description="atlas5")
+    bpy.types.WindowManager.subrect_atlas6 = bpy.props.PointerProperty (name="atlas6",type=bpy.types.Object,description="atlas6")
+    bpy.types.WindowManager.subrect_atlas7 = bpy.props.PointerProperty (name="atlas7",type=bpy.types.Object,description="atlas7")
+    bpy.types.WindowManager.subrect_atlas8 = bpy.props.PointerProperty (name="atlas8",type=bpy.types.Object,description="atlas8")
+
+    bpy.types.WindowManager.duv_hotspotmaterial1 = bpy.props.PointerProperty (name="duv_hotspotmaterial1",type=bpy.types.Material,poll=poll_material,description="Hotspot material 1")
+    bpy.types.WindowManager.duv_hotspotmaterial2 = bpy.props.PointerProperty (name="duv_hotspotmaterial2",type=bpy.types.Material,poll=poll_material,description="Hotspot material 2")
+    bpy.types.WindowManager.duv_hotspotmaterial3 = bpy.props.PointerProperty (name="duv_hotspotmaterial3",type=bpy.types.Material,poll=poll_material,description="Hotspot material 3")
+    bpy.types.WindowManager.duv_hotspotmaterial4 = bpy.props.PointerProperty (name="duv_hotspotmaterial4",type=bpy.types.Material,poll=poll_material,description="Hotspot material 4")
+    bpy.types.WindowManager.duv_hotspotmaterial5 = bpy.props.PointerProperty (name="duv_hotspotmaterial5",type=bpy.types.Material,poll=poll_material,description="Hotspot material 5")
+    bpy.types.WindowManager.duv_hotspotmaterial6 = bpy.props.PointerProperty (name="duv_hotspotmaterial6",type=bpy.types.Material,poll=poll_material,description="Hotspot material 6")
+    bpy.types.WindowManager.duv_hotspotmaterial7 = bpy.props.PointerProperty (name="duv_hotspotmaterial7",type=bpy.types.Material,poll=poll_material,description="Hotspot material 7")
+    bpy.types.WindowManager.duv_hotspotmaterial8 = bpy.props.PointerProperty (name="duv_hotspotmaterial8",type=bpy.types.Material,poll=poll_material,description="Hotspot material 8")
     
-    bpy.types.Scene.duv_hotspot_atlas1 = bpy.props.BoolProperty (name = "duv_hotspot_atlas1",default = True,description = "duv_hotspot_atlas1")
-    bpy.types.Scene.duv_hotspot_atlas2 = bpy.props.BoolProperty (name = "duv_hotspot_atlas2",default = False,description = "duv_hotspot_atlas2")
-    bpy.types.Scene.duv_hotspot_atlas3 = bpy.props.BoolProperty (name = "duv_hotspot_atlas3",default = False,description = "duv_hotspot_atlas3")
-    bpy.types.Scene.duv_hotspot_atlas4 = bpy.props.BoolProperty (name = "duv_hotspot_atlas4",default = False,description = "duv_hotspot_atlas4")
-    bpy.types.Scene.duv_hotspot_atlas5 = bpy.props.BoolProperty (name = "duv_hotspot_atlas5",default = False,description = "duv_hotspot_atlas5")
-    bpy.types.Scene.duv_hotspot_atlas6 = bpy.props.BoolProperty (name = "duv_hotspot_atlas6",default = False,description = "duv_hotspot_atlas6")
-    bpy.types.Scene.duv_hotspot_atlas7 = bpy.props.BoolProperty (name = "duv_hotspot_atlas7",default = False,description = "duv_hotspot_atlas7")
-    bpy.types.Scene.duv_hotspot_atlas8 = bpy.props.BoolProperty (name = "duv_hotspot_atlas8",default = False,description = "duv_hotspot_atlas8")
+    bpy.types.WindowManager.duv_hotspot_atlas1 = bpy.props.BoolProperty (name = "duv_hotspot_atlas1",default = True,description = "duv_hotspot_atlas1")
+    bpy.types.WindowManager.duv_hotspot_atlas2 = bpy.props.BoolProperty (name = "duv_hotspot_atlas2",default = False,description = "duv_hotspot_atlas2")
+    bpy.types.WindowManager.duv_hotspot_atlas3 = bpy.props.BoolProperty (name = "duv_hotspot_atlas3",default = False,description = "duv_hotspot_atlas3")
+    bpy.types.WindowManager.duv_hotspot_atlas4 = bpy.props.BoolProperty (name = "duv_hotspot_atlas4",default = False,description = "duv_hotspot_atlas4")
+    bpy.types.WindowManager.duv_hotspot_atlas5 = bpy.props.BoolProperty (name = "duv_hotspot_atlas5",default = False,description = "duv_hotspot_atlas5")
+    bpy.types.WindowManager.duv_hotspot_atlas6 = bpy.props.BoolProperty (name = "duv_hotspot_atlas6",default = False,description = "duv_hotspot_atlas6")
+    bpy.types.WindowManager.duv_hotspot_atlas7 = bpy.props.BoolProperty (name = "duv_hotspot_atlas7",default = False,description = "duv_hotspot_atlas7")
+    bpy.types.WindowManager.duv_hotspot_atlas8 = bpy.props.BoolProperty (name = "duv_hotspot_atlas8",default = False,description = "duv_hotspot_atlas8")
     
-    bpy.types.Scene.atlas_list_size = bpy.props.IntProperty (
+    bpy.types.WindowManager.atlas_list_size = bpy.props.IntProperty (
         name = "atlas_list_size",
         default = 1,
         min = 1,