With the base self switches you can do it like this.

const mapId = $gameMap.mapId();
$gameMap.events().forEach(event => {
    $gameSelfSwitches.setValue([mapId, event.eventId(), 'A'], false);
});

Hi Cathxart!

That same script should work with my plugin too. Just replace 'A' with the other self switches you waant. Like 'E'.