To uninstall:

On Windows 7, go to: Start -> All Programs -> GenArts Sapphire OFX.  Select "Uninstall Sapphire OFX".
On Windows 8, search GenArts Sapphire OFX.  Select "Uninstall Sapphire OFX".
On Mac, go to: /Applications/GenArtsSapphireOFX folder and double click on "Uninstall Sapphire".

• A deactivation dialog box will pop up.
• Choose to "Deactivate"

On Red Hat or similar Linux, open a shell window, type su to become root and run the following command: rpm -e SapphireOFX
On Ubuntu Linux, open a shell window, type su to become root and run the following command: dpkg --purge sapphireofx

Internet connection is required in order to successfully deactivate your license.