I updated Entrenchment without thinking, and so didn't uninstall Entrenchment and Sins and update Sins to 1.13 first and then redownload Entrenchment.
So now after toggling the show prerelease versions Sins is showing updateable separately from Entrenchment but won't uninstall (and neither will Entrenchment, which produced an XML error-2,28 if memory serves, prior to the next issue) because it wants Impulse to update first.
So Impulse decides it needs me to download the full installer to update it. I do so. I open the installer up and I get this shit:

Which then proceeds to tell me:

So I go to the Control Panel to uninstall Impulse, and it says there may have been an error and do I want to remove it from the list, and I say what the hell, sure.
But the shortcut still works and it's still in the program directory and it won't let me delete the Impulse program folder because it thinks something is using it.
*bangs head against wall*