Blue Peter World

Hi, I have just downloaded this and created a profile supported by my school to be able to enter the Blue Peter competition at home. 

I can get into the education edition and can see the Blue Peter World but when I click PLAY it is coming up with a page which says 'A newer version of the game has saved this world. It cannot be loaded.  Unable to connect to world.'

I would be grateful for your help with this matter,

many thanks

Thomas Smith