I have the same problem.
The way I managed it was by running it on my development machine through IISExpress and setting it to use the proxy.
<defaultProxy useDefaultCredentials="true"> <proxy bypassonlocal="True" proxyaddress="xxxxxxxxxxxxxxxxxxxxxx" /> </defaultProxy>
Once this was done you can look into the AppData/ModulesRepository folder to get the nuget packages.
Although a neat solution, the question still remains: Is there a standalone upgrade for 7.0 to 7.1?
I am keen to upgrade my local dev version of EPi 7, however, locally I have to authenticate with a proxy and as a result I am not seeing any available upgrades.
Is there a standalone download I can get hold of to bypass this issue?
Thanks in advance