I made a mistake. I figured out what happened. I was playing Minecraft and checking parameters from my world in NBT explorer. When I close minecraft and after that I close NBT explorer, the world will safe from the NBT explorer en overwrite immediatly the saved files by minecraft. This doesn't work for the inventory, this wont be overwritten by nbt explorers parameters. So its semi solved. NBT explorer should have a read only option where you can find what you need (like coordinates of a Buried Treasure) and never saves something or overwrite.
Jacky Harthoorn
I made a mistake. I figured out what happened. I was playing Minecraft and checking parameters from my world in NBT explorer. When I close minecraft and after that I close NBT explorer, the world will safe from the NBT explorer en overwrite immediatly the saved files by minecraft. This doesn't work for the inventory, this wont be overwritten by nbt explorers parameters. So its semi solved. NBT explorer should have a read only option where you can find what you need (like coordinates of a Buried Treasure) and never saves something or overwrite.