How do I change the application name settings?

Settings > Forms

The "Use as application name" option allows you to select a field in the application form that will be used as the application's name — this means that the application will appear on all lists for judging, public voting, etc. under that name.

By default, the Name field is set to "Use as application name", but you can change this by selecting this option on another field. To change the field used as the application name, go to Settings > Forms, open the form you wish to edit, then choose a new field (the Name, Text, and Company fields have this option) to be used as the application name on the lists.