i was just creating this huge city in minecraft. when i was half way and had build a football stadium and you name it i downloaded the wom client beacuse of the fly effect.

but when i saved the level it overwrited it somehow sp that when i opened it again it startet creating new level. i have bought the game so i saved on the user.
i had to use a old backup mine. file from the pc but when i then saved on that it got overwriten again and my city is completly gone now.
i used like 60 hours of my life on that. 

is it impossible to save a level in on the wom client or is it just some error for me???