1) In the app, select the 'Store' tab on the bottom bar, as shown in the following screenshot:
2) Next, tap 'Find Maps':
3) Then either scroll the List of maps that are near your location, or Search for the name of the property (ex: search for 'Boyden Farm Conservation Area Trail Map')
4) You can also find trail maps that are nearby your GPS location by scrolling the 'Maps' tab (next to the List tab), and selecting the blue pin points:
5) Once you've chosen the map you want to download, select 'Install Now':
6) Now you can access your installed map in the 'My Maps' tab: