RadarBox automatically updates its information from the GAS database - you don't have to download it, it happens when you are connected to the Internet.
Not strictly correct. Radarbox gets all its data from the Airnav servers. The Airnav servers then get data from various sources, including airliners.net, GAS, etc. This latter process isn't perfect, hence the regular "..." aircraft types, the "Untitled" in company names, etc.............
Once a week I run a process (described in the linked thread) to get data directly from GAS for new aircraft.