Uninstalling
Quit the engine, remove the app, and delete the macros, settings, caches, permissions and Keychain items Switchboard keeps.
Choose Quit Switchboard from the menu bar icon. Moving the app to the Trash does not stop the engine, which keeps running (and keeps your hotkeys) until you quit it or log out.
Drag Switchboard from Applications to the Trash.
To remove what Switchboard keeps for you, delete
~/Library/Application Support/Switchboard(your macros and history; copy the folder first if you want to keep them), then the settings and caches it leaves around it. Quit Switchboard first, or macOS writes the settings files back:~/Library/Preferences/com.payablesdesk.switchboard.plist(the editor's settings) and~/Library/Preferences/com.payablesdesk.switchboard.engine.plist(the engine's settings)~/Library/Caches/com.payablesdesk.switchboard,~/Library/Caches/com.payablesdesk.switchboard.engineand~/Library/Caches/Switchboard(caches, and pictures kept by the Drop shelf)~/Library/HTTPStorages/com.payablesdesk.switchboardand~/Library/WebKit/com.payablesdesk.switchboard.engine(web content its windows loaded)~/Library/Containers/com.payablesdesk.switchboard.safari, only if you turned on the Safari extension
In System Settings › Privacy & Security, select Switchboard Engine in each list (Accessibility, Input Monitoring, Screen Recording) and press the minus button. If you turned on Open at login, also remove it in General › Login Items.
Saved sign-ins and your account sit in Keychain Access under
com.payablesdesk.switchboard.accountandcom.payablesdesk.switchboard.byok; delete them there to forget them.