When a new version of a document is available, a red badge will appear on the app icon and there will be a new item in the Downloads view. Tap the blue Download button at the bottom of the Downloads view to download the latest documents, along with any other data updates that are available.
FAA and NAV CANADA documents that are updated on a regular 28-day or 56-day cycle will be available for download a few days before the document expires. Your document binder will always show the version of the document that is effective, if it is available. Once the new version of a document becomes effective, it will automatically start showing in your binders and any old, expired versions will be deleted from your iPad.