This is not a question about why Gates McFadden left TNG; that's been discussed elsewhere. My question is, why didn't they remove her name from the opening credits? Did they not have the budget to make new credits? Was her dismissal sudden enough that they didn't have time to edit the credits?

EDIT: I remembered McFadden being credited on the season 2 episodes when I watched them in syndication more than 20 years ago. However, it appears that either my memory was faulty or that there were changes made between versions, as online videos don't seem to have her credit. So, perhaps my question makes a false assumption. It would be interesting to see if anyone who has some of the earlier versions (such as on VHS) could confirm or deny her credit.