Originally posted by a.mcbob:

Yeah...consider yourself lucky. Despite them saying only newly explored areas would generate the Mistlands content, my base in an old Mistlands area was suddenly floating in the air above a deep lake. Not only did the house fall apart, but I was stranded for hours because the portal ingredients don't float.

All my loot is gone forever. There is no way to get it or revert the save or anything. I'm back in the copper age + a farm and portals. The reason why I updated is because I assumed my tree base would fall and I could just pick up the loot.