To completely uninstall Pinker app on Windows please execute the following steps:

  1. In Control panel -> Programs and Features uninstall Pinker
  2. Delete Pinker shortcut on Desktop
  3. Delete the folder where Pinker stores its configuration 
    1. Navigate to  %HOMEPATH%\appdata\local
    2. Delete the Pinker folder
Future installers are planned to include an option to retain or delete Pinker related files at user's choice.