With any file manager open directory with game client, where you will see "MAP" directory with sub folders, and files map.html currentsession.js .
Open map.html with any browser and you will see map created since last login.
subfolders represent date and time then u login, and maps created since then.
Maps created every time from scratch. If you want view old map , open with text editor currentsession.js
and replace date\time for one you need (for other subfolder what u see in map directory)
sorry for offtopic