One major thing I forgot. On previous versions three possible taxes (sales tax, local tax and room tax) were defined. This has now been changed so taxes can be anything you need with whatever name and however many you need.
The major new capabilities are:
extra charges (ie WiFi or extra camper etc.)
graphical overview of reservations
backup/restore capability
facility to manage log and session files
Many other changes that will not be apparent to the user are also added. See the change log for details.