Thank you for your post!
When you say you try to install FileMaker Pro 14.0.5, is it asking for a password before installation? That would be the Account Password for your Computer.
It seems you can access your database file, but you do not have Full Access? You would need an Account Name and Password for a Full Access Account to the file. This would be specific to the file and would not be affected by your update of the software. For further information on this you might see: Creating and managing accounts in FileMaker Pro | FileMaker
You did post this in the Community Feedback for providing feedback about the FileMaker Community. I am going to move this thread to discussions so that you might receive more views and advice.