The BellaDati Installation Guide is for people who are installing BellaDati on-premise for the first time. Check the requirements and supported platforms, then download and install BellaDati.
These resources are for software developers who want to create their own applications using the BellaDati REST API or prepare scripts for advanced data transformation. Take a look at the Developer Tools. You may also find the BellaDati Developers Forum useful.
The BellaDati Upgrade Guide is for people who are upgrading their instance of BellaDati on-premise. Start by reading the latest Release Notes for the version to which you are upgrading, then download BellaDati and follow the main Upgrade Guide.