Any update on this? Failed to get it installed last week due to Proxy issues (Networks Team are not prepared to change the system configuration of 7,500 employees just to install this on my machine!) so I'm in need of a fix...
I am getting problems to launch Ext Designer, due to I am behind a proxy that requires authentication.
When I configure to connect to a proxy that does not require authentication, it works fine.
So I guess, Ext Designer doesnt get the credentials correctly.