I had the same problem/ message with version Alt.Binz 0.31.6
Your solution did not work for me, but what i did was move the folder "misc" to another directory or rename.
Startup Alt.Binz and immediatly close it again it will re-create the "misc" folder, then i replaced the "config.abz" file with my
old (backed up) "config.abz" file so i had my config settings back.
However my server settings/ options were not correctly put back so i had to fill in the information again and everything works fine again