How to remove an already-installed Visual Studio 2013 extension .vsix file?

crash, visual-studio-2013

Solution

Find the correct folder under following folders for this extension and delete it

  C:\Users\[username]\AppData\Local\Microsoft\VisualStudio\11.0\Extensions
  C:\Users\[username]\AppData\Roaming\Microsoft\VisualStudio\11.0\Extensions

Problem

I've just installed Productivity Power Tools 2013 for my Visual Studio 2013 and then playing with the option of this extension and I get crashed :-( i.e. - The `Solution Explorer` window is now empty. - Cannot exit Visual Studio - Going for `Tools` - `Extension and Updates` fails too What can I do to get back to where I was >.<

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