Was working fine then one day the program refused to work. Anytime it was opened it would immediate force close. Ive uninstalled and re-installed, deleted drivers, tried different versions of the program to no avail. The more I try the worse my mouse works. I desperately miss my custom settings, without the program the mouse is just an expensive piece of poop. Its an m705. Im running 64-bit Windows 7.

Edit: I finally got it, after multiple days of trying, found an older version that works with 64-bit from a non-logitech site. Its a shame that their software is so buggy.