Are you directly launching the game from the STO folder? If not give this a try. The Arc launcher was causing an issue, at least for me, when I launched STO via it by locking/crashing the game. When I created a shortcut to do the aforementioned directly form the STO folder fixed address this.
At least am not alone in this regard. The Rahhae was the only one I claimed from the pack, I got the starship trait back when it was 1st released, now nothing. It was working at some point, Arc has some explaining to do ;)