How to Recover a Deleted Minecraft World with Delete Worlds To Trash
Restoring Worlds from the Recycle Bin
Normally, deleting a Minecraft world erases it permanently. With Delete Worlds To Trash, the world folder is instead sent to your operating system's recycle bin or trash, so you get a second chance to bring it back.
To recover a world, open your system's trash or recycle bin and locate the deleted world folder. Restore it, then move it back into your Minecraft saves folder so the game can find it again. The exact location of the saves folder depends on your launcher and operating system, but it is the same place your other worlds are stored.
Because the mod relies on your system's trash, recovery works the same way as restoring any other deleted file. If your system does not support a trash or recycle bin, the mod's custom interface will tell you, and deletion behaves differently. Always check the interface before deleting a world you might want back later.