Ukelele is not able to reassign modifier keys (option, shift, command, control, caps lock), or change the function of special keys (return, arrow keys, function keys, etc). Rather, it is for creating keyboard layouts for different languages or other needs.
By the way, the name of this software is intentionally misspelled. more...
- [Fixed] When creating a new key map as a copy of an existing map, the new key map had the same index as the old one, so the keyboard layout was invalid.