Changes made from version 3.3.2 to 4.0.1:

Added Garmin Adventures, including; authoring, publishing, online search, downloading, playback, and transfer to supporting devices.
Added a Photo Dialog to view geotagged photos in BaseCamp.
Added ability to filter tracks by time, distance, or number of points.
Added arrival, departure, and layover times for route via-points.
Added a context menu on the map for the hand and selection tools.
Added support for waypoint creation date, which will not be changed when updating the waypoint.
Added a list in the waypoint properties dialog to display which routes a waypoint is used in.
Added support for temperature and pressure in track statistics and graphs.
Change to handle delete waypoints that are included in a route better.
Added Basestation mode for compatible Astro, Rhino, and Alpha devices.
Added intersection search when using the 'and' or '&' keywords.
Added display of postal code in address search results.
Added a read-only 'Unlisted Data' list that contains all items that are in no other lists.
Added ability to create a route from a named trail.
Added ability to import into folders and lists (and not always import into My Collection).
Added link to the BaseCamp license agreement in help menu.
Added ability to undo/redo changes made to data on a GPS and SD card.
Added ability to accept Google Maps coordinate format when centering map at position.
Added new dog icons.
Added waypoint creation date to the waypoint properties dialog.
Added ability to center on selected point in the track properties dialog.
Added number of maneuvers in the driving directions in the route properties dialog
Added option to encourage the user to recalculate a route when the map that the route was created with isn't found on the device.
Added prompt when duplicating a route if BaseCamp should also duplicate the waypoints used in the route.
Added size of selected BirdsEye imagery to the status bar.
Change to narrow the POI categories available in find to the ones supported by the current map.
Improved 'stack' when many photos are at the same spot on the map.
Improved XML processing (so it should now be possible to import and export larger gpx files than previously).
Improved the measurement tool's display of measurement information.
Improved behavior when importing data into an already selected list or folder.
Improved behavior when double-clicking on a list. BaseCamp will now zoom to the data contained in that list.
Improved default file name for backup. The default name now contains the current date.
Changed icon for gas stations with convenience stores to be the gas station icon, not the shopping cart.
Fixed an issue where a device's SD card would not always be recognized by BaseCamp.
Fixed numerous issues with finding addresses.
Fixed area calculation for tracks.
Fixed an issue where you could not rename an item from lower case to upper case (like renaming 'washington' to 'Washington').
Fixed issue where the Geocache symbol was not consistent with found status when importing or adding a geocache.
Fixed an issue where turning off the display of points would leave a lot of 'shopping cart' POIs on the map for certain map products.
Fixed an issue where the selection was lost when left-clicking on the map with the hand tool.
Fixed issues with creating routes from tracks.
Fixed issue with displaying custom maps on devices.