This "upgrade" is complete *****. None of my application specific keybinds work in this new software. Even after re-doing all the keybinds and restarting everything, it still doesn't work. The best part, is that after installing this garbage, if you try to go back to the old logitech options software, it says this mouse is no longer supported. Even though it was working just fine with that software, until this new * + version came out. I use this mouse and a number of application specific keybinds in a professional editing setting. This has caused significant time lost trying to get it to work correctly, and now all of the projects being worked on will take longer and be more frustrating because none of the shortcuts or special keys work on this mouse. Thanks for basically bricking my workflow, all for the added benefit of no new features in this new software. Super.