Enable the app by going to System Preferences>Touchbar Shows>App Controls. Also make sure that "Show Control Strip" is checked.
Also check that your security & privacy settings allow you to use the app by going to System Preferences>Security & Privacy>General>Allow Downloaded Apps from: Anywhere.
We started this project because we wanted a really convenient way to get quick glances at stocks without having to flip between applications or do web searches. We're just two guys who are having fun. If you like our app, please support us! We are always adding new capabilities, and welcome your input! If you have feature requests, please contact us.