Creo Progressive Die Extension (PDX) Reference Guide > Using PDX > Die Sets, Projects and the Plate Wizard > To Remove Unused Components
  
To Remove Unused Components
When components are deleted from a project they remain both in memory and on the hard disk. To remove models those are no longer part of a project:
1. Click PDX Tools > Project > Clean up. The Clean up Project dialog box opens.
2. Select the components to remove. Click to select or to deselect all components.
3. Click OK.
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Components cannot be removed from Pro/INTRALINK or Windchill workspaces and must be removed manually.