Thanks everybody. I wound up updating to 6.3.1 using the method described on
this page.
It has been a few days and it looks like my runaway downloads have stopped....whew.
Oh, HughesNet satellite is not so bad because between 2 AM and 7 AM everyday you can download as much as you want....which I do using a scheduler.

I can download 1.5 GB's a night...which I often do. So I could download 45 GB's every month and I bet no one else can do THAT on their ISP. It is a pain that we can't stream or play internet videos during the day though.
We would prefer high speed broadband but it's still not available where we are...on top of a mountain in the NC Appalachian Mts.