I'm not sure if others are having this issue but whenever I try to make a change on the character card, the card is grayed out and i cant overwrite the other save. It say registered and has a gold star in the top left. Is there a way to get the card to no be grayed out anymore?
There's no overwriting a Registered girl unless you use the Data Terminal during actual gameplay. It will still look as if you can't overwrite your card, but once you make changes and go to Exit the creator, it will ask if you wanna save. Saving then will, in fact, overwrite her card.
If you try to make adjustments outside of actual gameplay (creator from the main menu), Any girls who are in a saved game will be marked as Registered (grayed out) and the only way to alter them without doing so at the Data Terminal in the game world would be to delete the Save (that game's progress) from the Start Game option, when you choose what to Load (or Delete).
Any girls used in a game will be Registered until that save file is deleted,
unless of course you choose to make a copy of her for use in another game slot.