What does this mean? Some sort of tracking or browsing cookie?
Yes, it seems to be. I dont use IE anymore because its riddled with popups and I cant be bothered fixing it. Firefox is great.
I dont know if they have attached that & I doubt they have. I think it would be crazy if they did.
Is it your 1st download?
I dont know much about it. My answer to most things it clear your cache and reboot your PC.
PC's and Mac computers have a different download page, maybe you are trying the wrong one. I know nothing about Macs