I filed a Bug Report on this yesterday.
I added a Bogan saber to a character outfit and when I committed the change the game froze and crashed.
Later I added Ashla saber to a different character and again, the game froze and crashed when hitting Commit in Outfitter.
My issue isn't due to switching weapons thru Combat Styles, but this may help narrow down what's creating the issue since both the Bogan & Ashla sabers alone can create a game crash just by adding them to the outfitter.