DAP can be updated and new features and fixes downloaded without having to download the whole program from scratch. From DAP 5 you can use the 'DAP Update' feature to keep your DAP up to date.

Choose 'Update DAP' from the Help menu

Alternatively, choose the 'About' from the Help menu and click on 'Check for Update' button.
The Update window will appear and DAP will connect to the server and search for available updates. If updates are available, they will be automatically downloaded and installed, and DAP will present you a report at the end of the process.