We will send certain data points as you use the applications to help us learn which features are ignored by the users and which are heavily used. We may use that learning to improve our user interface and eventually make special in-app and online tutorials to make sure our users get the most from our tools.
If you leave this open, we will send list of errors to our server after each conversion. If there is unexpected crash in the application, we will log that, as well. If you contact support, our developer will then be able to see which problems you had with the application and help you much better compared to when we don't have that information.