After starting a new world with forge and using it for a little bit, the moment I saved and exited, I can no longer update the game. AKA, After saving the game and going back, I remove one block. Save and Exit again. I reenter and the block is back were it was. I can make no progress in anyway after. No matter how many times I play and try to edit the game, aka, play, remove, replace blocks, so and so, it will not update after I save and exit. It is back where it was in the very first save.