Installed a couple new DLCs and expansions, but after playing, one of the npc sim turned vampire. I thought ok but the outfits totally changed. I can re-edit them back to the default outfits but the default career outfit is off big time! The sim career is in the military yet her outfit is a blue dress with no shoes...... and I am thinking she needs to be in a psychiatric ward..... o.O....... But is there a solution in fixing the default career outfit?

The default career outfit shenanigans is due to Showtime. You can use a wardrobe from Showtime onwards to change your career outfit but to keep a special kind of uniform you'll have to use unlockoutfits on to, well, unlock the outfit. Preferably used in game rather than on the select game menu, and obviously before entering CAS. :P