How to update template caches in VS 2010

Question

I need to update the caches for item templates in visual studio to remove some deleted templates, and I tried to run:

devenv.exe /installvstemplates
devenv.exe /setup

devenv /installvstemplates
devenv /setup

and everyone could not remove the deleted templates from the list.

Edit:

I just tried changing one of the stock templates and updating it with each of the above commands. It remained the same on the list and worked exactly the same when I used it.

Edit:

Just like an idiot, I did not use the Visual Studio command line, I used cmd.exe. Now it works fine, if a little slowly.