Ensure that you have FULL security-permissions to your Plugins folder [select its icon, context-menu Properties > Security > Edit...]. With limited permissions the files/subfolders might look OK, but are really put into a VirtualStore - 'Compatibility Files...' ... I think that you have NOT installed the files properly. Reread the two threads and ensure that the various file/subfolders - names and structure - match exactly. If the files are correctly installed then the tool WILL work after a restart of SketchUp.