The lack of any sort of basic menu structure added to the lack of a quit button makes bindconf pretty confusing. There's no help, just buttons for adding and deleting. To exit, you use the wm close button, the main window closes and then you get asked if you want to save the changes. Even just a simple menu structure with an exit, an about, and menu items for the things there are buttons for would help a lot.
This will definitely be taken care of in the reworking of this app due to be release before or in the next beta. We realized the shortcomings of the interface and have completely redone it. Thanks.