Asset Store downloads all stop

Trying to download anything of more than a few M from Asset Store just stops after about 10%.
I just downloaded about 12G from Autodesk updating apps and other sites are working.
Anything special to using the asset store from within Unity?
I’ve been trying to download the Environment pack for days.
Always starts and then network traffic ceases after about 5 minutes.
I have current Unity 4 pro.

You’re doing better than me, I can’t purchase anything - the basket tab up the top shows it has something in it, but it won’t open…also when I click purchase, I get “please wait”, then the price comes back up, no option to buy it. Hell of a way to run a store lol.