RotMG.sol

This is what the LSO (Flash cookie) RotMG.sol includes (yes it's in plain text).
In this example: Email = email@addr.ess & Password = passwd
    ¿   HTCSO      RotMG   	GUID#email@addr.ess Passwordpasswd

It's the file that is used to log in. I have mentioned it having the email + passwd in plaintext on the old wildshadow forums about two years ago, and the risk of leaving those on public computers (libraries, net cafes, schools). Kabums don't care enough to fix it.

They are stored in
 Microsoft Windows 2000/XP/Vista/7/8:
    %APPDATA%/Macromedia/Flash Player/#SharedObjects/

 Mac OS X:
    ~/Library/Preferences/Macromedia/Flash Player/#SharedObjects/

 Linux or Unix:
    ~/.macromedia/Flash_Player/#SharedObjects/