[fix] register prevent re-registering

__init__.py

@@ -23,7 +23,6 @@ Classes = (BLENDERGPT_PT_PANEL, BLENDERGPT_OT_DEL_ALL_MSG, BLENDERGPT_OT_DEL_MSG
 
 def register():
     for cls in Classes:
-        if cls.__name__ not in bpy.types.__dict__:
         bpy.utils.register_class(cls)
 
     props_initialization()
@@ -31,7 +30,6 @@ def register():
 
 def unregister():
     for cls in Classes:
-        if cls.__name__ in bpy.types.__dict__:
         bpy.utils.unregister_class(cls)
 
     props_clear()