It's really easy. in the planning mode theres an upgrade selection under the file menu. That pops up your licence information and you simply click "Deactivate copilot"
If you do decide to buy copilot, make sure you always deactivate it before you reformat your hard drive, otherwise you have to email them and have them deactivate it before you can reinstall copilot on your new install.
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A digital mind lost in an analog world.