If you have the original game file for 1.8 you can patch it to run without having to log in, might also work for 1.7.what is this for?
I'm hoping someone else will test it, but otherwise it might take a while for me to play the game and be sure nothing is seriously broken, because there might be certain traps I missed. For example there's one that deletes your save file if the login credentials don't match certain rules.