It's impossible to add hotkeys on OSX and the hotkeys which are already set won't work.
If I try to add a hotkey, for example Shift+Ctrl+X, the program will only add Shift and Control to the Hotkey - pressing other buttons (like letters) doesn't work.

I've already changed the accessibility settings multiple times which did not resolve the problem.

OSX Yosemite 10.10.5