Usually GoldenDict store all program settings and dictionary indexes in home folder of current user. In portable mode program settings and dictionary indexes stored in "portable" folder beside the main program file. This mode suit for using of GoldenDict with common settings directly from flash drive on different computers.
To turn on portable mode it needs only create "portable" folder beside the main program file. If such folder exists GoldenDict will launched in portable mode.
In portable mode GoldenDict works with some limitations: