When installed, PlayIt Manager will include an Uninstall shortcut in the Start Menu.

If you chose not to add Start Menu shortcuts the Uninstaller can be found at (by default):
  C:\Program Files (x86)\PlayIt Manager\uninstall.exe or
  C:\Program Files\PlayIt Manager\uninstall.exe

Double-click the icon to start the uninstall process. Click Uninstall to remove PlayIt Manager.