Totally crash my webstite after adding plugin and applying some changes.

I applied this plugin to enable or make mega menu,
at first this just perfectly fine but about an hour after, my mysql server is not responding, I applied this menu on on home page, if i open different page rather then the home page it will works but if i open mega menu page, this shit is not able to process the page, and my page always reloading. Otherwise the mega menu works only for 2/hrs. thats it.