How to undo Minecraft Xbox saves to the previous version?

I need help I've been working for 1 year to make this world and I updated to the latest version of Minecraft xbox then my I entered my world all of my buildings has disappeared My world Is like an Adventure Map that has a lot of things like stampylonghead buildings anyone can undo my world to it's previous version will receive my world as a reward

Updates should really be saved individually somewhere in memory too (and i could be wrong here, so don't quote me on it, lol!). I'm not at home to check, but when i get home from work tonight, i'll apply the patch then check my harddrive and see if the patch is stored on memory alongside your game saves. If it is then you should be able to delete it without affecting any other game… I'll check later and let you know if it is or not.