Asset store download manager very very slow, freezing

I normally use a mac (and the asset store has it’s own share of problems on OSX), but I recently tried using unity on Windows. The only issue I have is with the asset store download manager - it’s VERY VERY slow. doing anything will cause a delay of anywhere from 2-20 seconds! I click something, then wait several seconds for it to happen, and then wait 10-20 seconds for it to accept clicks again! Has anyone seen this besides me?
Any idea on what could be causing it? I probably have several hundred assets that I have purchased, and it’s really painful trying to get to them and download them with these pauses and freezes.

I’ve got problems on both platforms, so I tend to use the web browser as much as possible. But that behaviour looks more like a temporary network issue.