To uninstall:

On Windows 7, go to: Start > All Programs > GenArtsSapphire AE.  Select "Uninstall Sapphire AE".
On Windows 8 & 10, search for GenArtsSapphire AE.  Select "Uninstall Sapphire AE".
On Mac, go to: /Applications/GenArtsSapphireAE folder and double click on "Uninstall Sapphire".

A deactivation dialog box will pop up.

If your machine has Internet connection:

• Choose to "Deactivate your license now (requires internet connection)".

If your machine does not have Internet connection:

• Choose to "Deactivate your license manually using another computer's web browser".