So, what's wrong with the default window name given by FileMaker? Imagine a user of your solution has multiple windows spawned on a small screen and goes to the Window menu to select the desired window. Without good window management, all he sees is "CONTACTS", "CONTACTS - 2", "CONTACTS - 3" and so on. With good window management, you can make it easy for users to quickly find the window they want without cycling through all of them.