Tried Downgrader 0.1 from Somthing Unpredictable at an experimental setup HERE.
Instruction says "Simply upgrade (upload?) the script to your root WordPress directory and access it via your browser. Be sure to delete it after use". That was what I did, put the php file on the root of the installation and point the browser to that php file. Result was NOTHING happened?
I wonder what have I done wrong?