If you exported the save previously, you can just re-import it and you can load the save from when you last exported. Otherwise, you'll have to start a new game, as previous versions of saves are not stored.
i also love that you can alter the files just by exporting your save in options and then changing the asav files data i personalty made a magic pickaxe that breaks any thing that is solid i went through the bottom of the world turns out that it just teleports you back up i also filled the land up with water by breaking the sand walls on the side
i love this game so much i definitely love that you can press ctrl + shift + d to open the dev console and then run the command player.addItem ("magic_box") and have everything you will ever need
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If you exported the save previously, you can just re-import it and you can load the save from when you last exported. Otherwise, you'll have to start a new game, as previous versions of saves are not stored.