Hi stevencoleman590 - thanks for your feedback. Registration or "signing in" isn't required, though it is useful. You should be able to download the app and immeidatly upon opening the app, see the start up screen. Click here for more information on creating an account.
Here's a video that discusses how to start a round, select a course and get started. We have more on YouTube and in our support.golfpadgps.com portal. If you still have trouble, you can open a support ticket and we'll help you out.