add option to instantly delete all saved entries/history without having to remove/reinstall the addon

[shocked-gamer]

currently as it is, the addon will remove entries only if a certain amount of days has passed.
i have set it to auto clean after 30 days, but if i deem that the currently saved history isn't going to be used anymore, i'd like an option to instantly remove it without the need to uninstall the addon, cause i've seen that's the only option to remove it completely but it doesn't preserve the settings.