I'll try the DEV.exes. Yes, I did verify install with impulse, and Sins was purchased and downloaded through Impulse as well. Also, I have no mods installed, and never have for Sins or any other Stardock game I own.
Thanks for your help myfist0. Let me give your suggestion a try.
Not sure that it matters, but I uninstalled Sins Trinity through Impulse and likewise installed. Perhaps I should have used Add/Remove Programs to be sure the reinstall was clean?