I would open a ticket with support if a stardock blue doesn't come by your thread. The original problem I had getting TW:EE from Impulse was different than yours, so I hesitate to suggest what it was I ended up having to do, because while I was sorting that issue out last week, Impulse was updated at least once by Stardock.
If I had to take one and only one wild guess, the first error " The operation has timed out." might be related to the problems Impulse has with BITS services. You might want to check to toggle the option set for downloader preference. Click the stardock icon (top left of Impulse window) select Preferences, and under Connection check the box to use the new downloading mechanism. This is on by default in new Impulse clients, iirc, but it's possible that it's off on yours. Good luck, and hope the topic bump brings a blue by for you.
