The easy way might be to uninstall DM from Windows, then reinstall. I don't know for sure so 50/50 this will resolve the issue and it won't hurt to try.
If you get the links back again it probably means they device identity is stored in Windows Registry. It might mean a bit of searching to remove it manually, and registry editing is scary even for experts if you don't know exactly what you are trying to achieve. Feel free to ask again if this becomes necessary, and balance the risk to your PC against the nuisance of a few dead device links.