Just got a used RSP2. It will soon be time to download the software. When I went to their site, I found there were 4 under the title of SDR Software and 8 more under Other Software. I'm really a newbie here with all this stuff. I've seen the waterfall screens on YouTube videos, but that's about all I know about it. Why are there so many different software programs available to run one piece of equipment? How do they differ? Do they have different screens or do they all look the same? Completely confused here is putting it lightly!!!!! Any comments and insight will be much appreciated.