I load up my world and it still shows the new world's thumbnail and not the old world's thumbnail, I click on it and it just says "There was a problem loading this world".
How to find/fix lost Minecraft Windows 10 Edition worlds
If you have lost your world (meaning when you open the game your world is missing) this may be helpful. THIS IS FOR WINDOWS 10 EDITION ONLY
I have had this problem and have fixed it using this method (couldn't find anything to help so i figured it out then made this, so you won't have to figure it out yourself).
Just so you know, my problem occurred because i had a power outage as my world was saving after i closed it. I don't know if it may work for you, but best to give it a shot, it's short and easy.
First off open Minecraft and make a new world (give the world the same settings as you old one, as the settings will change after the process). Save and close and save the world, then close Minecraft.
Then, open files explorer. go: This PC/Local Disk (C:)/Users/User/AppData/Local/Packages/Microsoft.MinecraftUWP_8wekyb3d8bbwe/LocalState/games/com.mojang/minecraftWorlds
If you have trouble finding the folder try this: https://help.ableton.com/hc/en-us/articles/209070509-How-to-access-hidden-folders
It is easier if you only had one world (I did) but there should be two (maybe more for you) folders in the minecraftWorlds folder that has a few random looking characters. As I said I only had one world so for me there was two folders, my old lost world and the new world I had just created. If you have more than two folders you may just have to do some trial and error, although they are in order of creation with oldest being at the top, newest at the bottom (the bottom-most folder is your new world).
Open you newest world folder (the one you made earlier) go to the db folder, delete everything in there (not the db folder itself. Go to your lost worlds folder, go to the db folder (for me there was another "lost" folder in db, that's fine). Copy everything in the db folder, including the "lost" folder. Go to your new world folder, go to the db folder, paste the contents from the old db folder into the new.
Open Minecraft, go to worlds (the world should still be called "My World", you can edit it later). Open the new world and you should find it has become your old world.
I hope this helps ! I have not seen anything else explaining this so I this helps some people, happy mining!
Windows for home | Windows 10 | Gaming
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Anonymous
2020-09-03T01:51:19+00:00 -
Anonymous
2020-06-24T19:26:30+00:00 are you saying you cant find the lost worlds folder with your old world's files? if so, it may not be crucial because i didnt have one but the process works just fine. if you're saying you cannot find the old world folder itself, an easy way to start is go to the computer search bar, type run, then enter. a small box should pop up, in the box, type %appdata% and hit enter. you should be in the roaming folder. go back to the appdata folder, click local, then go from there.
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Anonymous
2020-06-23T20:03:40+00:00 i cant find the lost worlds folder, pls help :(
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Anonymous
2020-04-13T09:43:53+00:00 Words aren't enough.
Thank you.
You are a hero. You saved mine and many others werks upon weeks of hard work and effort.
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Anonymous
2020-03-12T18:54:24+00:00 Thank you so much, me and my friend recently made a survival world and found like 18 diamonds, my game froze a few times and froze for good causing me to shut down my PC. When I went back on the game, my world wasn't there. I did exactly what you told me to do and my world is now back. :D