and make sure your Tool Palettes are visible ( Ctrl + 3 ).
Once you have downloaded your updated files, follow these steps to integrate them into your project: How to import Custom Subassemblies to Civil 3D? - Autodesk civil 3d subassembly pkt download updated
.pkt files from the Autodesk Civil 3D Content Browser or Autodesk Knowledge Network without waiting for a service pack.ImportSubassembly command has been updated to handle .pkt files more efficiently. Civil 3D now automatically generates the necessary .atc (Tool Catalog) and PNG image files in the user's profile directory (%AppData%) rather than the program files folder, eliminating the need for administrator privileges when adding new subassemblies.