Installing Let's Encrypt changed root directory

I installed Let’s Encrypt via these instructions, but it changed my root path from /var/www/html to /usr/share/nginx/html – is there any way to reverse this?

I modified my sites-available default server block to the following (and restarted it), but it didn’t help:

server {
	listen 80 default_server;
	listen [::]:80 default_server ipv6only=on;
	
#	root /usr/share/nginx/html;
	root /var/www/html;
	index index.html index.htm;

	# Make site accessible from http://localhost/
	#server_name localhost;
	server_name MYDOMAINHERE;	

	location / {
		
		# First attempt to serve request as file, then
		# as directory, then fall back to displaying a 404.
		try_files $uri $uri/ =404;
		# Uncomment to enable naxsi on this location
		# include /etc/nginx/naxsi.rules
	}

}

Any ideas?