Greetings all - There was something misconfigured on the server which was causing some Entrenchment installs to not work. If you fall into this category (and I imagine you know who you are) please do the following:
1) In Impulse click the Stardock logo (orb) in the upper-left and select Check for Updates (or restart Impulse).
2) Install Entrenchment normally. If you have an install in progress and don't want to take any changes, Cancel it and start over.
My apologies for the issues.
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I honestly don't know if the wrong folder was the only thing that went wrong or if there's something else, but at this point since it sounds like SD fixed it on their end, a clean re-install would not hurt? Might be worth a try.