Edit2: MY next post is likely a safer one to do before the steps in this post.
Then, exit out of Code::Blocks
Open the folder %APPDATA%
Open the sub folder Roaming\CodeBlocks or CodeBlocks.
Rename the file default.conf to something like default.conf.old
Last restart Code::Blocks
Edit: I use WIN+R to open the %APPDATA% folder.
Tim S.