What you are looking for is a folder called “Settings_Default” within you will find a mess of .DAT files. I never used the "%LOCALAPPDATA%\CCP\EVE" to find them. I did an explorer file search for; core_char*.dat and included hidden system folders too. Maybe you can find duplicates using the file search?
As far as I can tell you, core_char*.dat is your character’s personal settings and core_user*.dat is your account settings. When I finally got this interface looking readable by my standards, I made a backup of all the files in the Settings Default. I placed this new backup in my documents and zipped it, just to prevent the program from tampering with it. When they changed the launcher my settings were toast. I extracted that zip file and wrote over the folder, but some hardware settings didn’t work, those I had to reset manually.