Hi,
you can load your screenset file into MachScreen. Use Menu View ->Hotkeys. This will show you all assigned hotkeys.
To sort the list, just click the header column you want to sort. Perhaps you can find the reason why some of your hotkeys don't work.
To change a hotkey, change the view to "Design". Select the page in the property box, select the button you want to add a hotkey to(be sure the multi / single icon shows "1", this is the second icon form the right in the toolbar). Doubleclick the value column in the hotkey line. This opens an edit field. Just press the key(s) you want to assign. If you assign an already defined hotkey, a error message shows where this hotkey is already assigned.
Klaus