Build Mode/Manage Worlds Not Working

After todays update, my build mode no long works. Just this morning I was able to work on a house, and now whenever I click on the build mode it freezes, no item catalogue pops up and I cannot go back to live mode. I can save, open the new "packs you might like" tab and the gallery just fine. Whenever I tried to exit to Manage Worlds to see if maybe it was just a bug, it got stuck on a white screen. 

Help...