I have the old M560 on one laptop and can't use this app to define what to do with ctrl and shift with this older device. I'm disabled and this new app allows me to define ctrl and shift for the newer M650 on another machine. Well done on this app. The thing from stopping me using other Logitech products was setpoints lack of support for mapping ctrl,shift, alt keys without any other character. Hopefully I can do it and I'm just missing something?

Regards,

Sean