Александровск-Сахалинский, Карачаево-Черкесская Республика, Switzerland, Via Stauffacher 87
https://mc-plugins.net/bukkit-spigot/regenerator/
If the above method would not work for you, or you are running a version of OptiFine that's too previous to be compatible with the instructions above, this is one other manner you may get it up and operating in your Minecraft recreation.