Tu n'es pas un cas isolé à ce que je vois, tu es sous Windows 8 ? :
http://www.overclock.net/t/1338266/roccat-kone-xtd-review
"All these features are useless however, with the latest software (version 1.15) branded ‘Roccat Kone XTD Mouse Option’ being seriously buggy, at least with Windows 8 (for which they tout compatibility). If I press ‘Apply’ or ‘OK’, the program freezes for up to two minutes, and even then it takes a few tries for the mouse to actually respond to what I want it to do. Beyond changing the sensitivity or DPI, I can’t do anything except change profiles. This means I am basically limited to the five default profiles, with their button assignments and colour options, and thus I literally have no way to customise the mouse. This is a serious flaw, and something which Roccat needs to address ASAP."
En gros, il semble que c'est pas encore super au point, guette les prochaines mises à jours et réinstalle les nouvelles.