The first time you use MacroView Mail you will see the welcome screen with information on the App and the MacroView End User Agreement.
You must accept the terms of the End User Agreement in order to start using MacroView Mail.
If you do not want to see the Welcome screen each time you use MacroView Mail un-check the Keep showing this welcome screen option. You can always re-enable later it under Settings.
Another advantage a disabling the welcome screen is that when saving emails that do not contain any attachments, the save commence at the Select where to save screen making saving your emails even quicker and easier.