Create 2 new user accounts, sign in to each, then sign out of all accounts.I tried creating only one but it wouldn't let me copy the files from the new account I was signed into as they were also locked. As the files in my folder were locked, I actually had to create two new user accounts. As my user account was the only one on the machine, I had to create a new user account and copy this entire folder from that account and overwrite mine. C:\Users\\AppData\Local\TileDataLayer\DatabaseA search in Google brought me to this forum which pointed me in the right direction - replace the contents of this folder with good non corrupt files.
