1. Go to http://ra.derbydatabases.com and download the Windows version.
2. This will download the Windows version to your Downloads folder. Now run the downloaded version . You may have to give permission to allow the ScreenConnect / Derby Databases software access to install and it may take some time for Windows to ask you for that permission. If it seems to be doing nothing, Look out for a flashing icon in the taskbar and click it to give permission