Toe_ma_toe

So My friend and I were in the middle of making Houses and buildings in my server and then we decided we wanted to change the name. We changed it in the minehut server controls but it wouldn’t change when we looked at the server. We restarted our Minecraft tab but it still wouldn’t change so my friend told me to restart the server (the red button on the right side of the stop button) so that it would refresh it and the name would change. It didn’t and now all my houses and buildings are gone and it’s a whole new world, I just wanna know that if the hit that restart button, will it start a Delete everything and start a whole new world? Or if I go into the world tab and click reset world will it will delete Everything and restart a whole new world? Or do both buttons delete and restart a whole new world. I’m really confused and I’m new to controlling minehut servers so I wanna know in the future. Thank you! Sorry for any grammatical errors.