Minecraft Forums

So I loaded my biomes o plenty map with vanilla you would of thought it would give me some warning or something but nope it just loaded right up and ruined my map i've been played for a long time.... the launcher doesn't keep your default, I always have to change it so then bam I changed it to the wrong thing once. it doesn't even keep the order it seems... anyways I know its not the best idea, but I should some how to be able to regen the world to what it was like before I did anything to it right? like certain chunks make them go back to the default biome o plenty state right? Maybe mc edit it or something? I have no idea how that works with mods though. Even if I can't regen it can I copy chunks over from a new born seed? I have a older version windows gave me but its from a week ago so maybe I can copy the space that was damaged from the old version? I don't know how to do any of that but I've seen it done (tho no world generation mods) there has got to be a way to fix it somewhat even if it isn't perfect any ideas? Luckly my base doesn't seem like it has been effected very much. But some of the biome are just huge holes in the ground...