Uninstall Maclip
If you plan to use your licence on another Mac, deactivate this one first so it doesn't count against your 2 Macs.
Updated
Optional: erase your history first
Settings → Danger Zone → Reset All Data & Start Fresh deletes your history and settings. It asks for Touch ID or your password first.
Remove the app and its data
- Click the Maclip icon in the menu bar and choose Quit Maclip.
- Drag Maclip from Applications to the Trash.
- To remove your history, delete
~/Library/Application Support/Maclip. In Finder, press⇧⌘Gand paste the path. - To remove settings, delete
~/Library/Preferences/com.maclip.app.plist. - Open Keychain Access, search for
com.maclip.app, and delete the storage and licensing items. - Remove Maclip from System Settings → Privacy & Security → Accessibility.