The Account Window is the first window you will see when you download the app for the first time. It provides you with fields to enter your Username and Password, which are necessary to allow the App to sync with the GoPAD Portal where the report is produced.
There is also a Sync button, which initiates a sync between the App and Portal. (This does the same thing as the Sync button on the Form Window) Usually, there is no regular need to open this window once you've logged in after the first time.
Additionally, the top menu bar contains an About button, which will show you the version of GoPAD currenly installed on your device.
At the bottom of the Acount Window is a Reset button. Pressing this button will remove ALL data from your device. This is unrecoverable, and should only be used following instruction from GoPAD Support.