I found a solution of the first day of hiring black screen. Yes, you need to install the valentine events, it seems that it got some missing files in there. You can't download from the site , but instead download from your in game menu (COM3D2 SHOP). This should fix the issue, other than this l don't know. Thnks to Barovaro for this.
Thanks, this seemed to work.
I have a legit steam copy and for some reason it wouldn't let me download any dlc from the com3d2 site if I started the game through the desktop shortcut of com3d2 steam provides, so I started the game up without the x64 as Dave 237 suggested and I could download dlcs.
Didn't need to restart my whole save, just used a save where the new personality wasn't hired yet. (Luckily for me I saved a day before I hired her). Though I found that if she's already hired WITHOUT the Valentine's dlc, I crash. It corrupts your save apparently. (At least for me it did). Once I had the Valentine's event in I could start the game from anywhere and it worked without any crashes. My fix was, install the Valentine's event, THEN hire her. Wouldn't work for me any other way.