Hi JBuck, perhaps you didn't run the three applications that I suggested? I've found on occasion that steam misses the 'first time execution' of these redistributables and the only way to fix this is to run them manually. No amount of uninstall/install seems to fix this.
Don't worry about Win7 vs Win10. Just look for those directories/applications under your Star Control - Origins directory.
If none of this works, then it's time to send your RunLog and settings.ini files to Stardock: ppen File Explorer, click "This PC', and do a search for RunLog.txt on your drive. If the file is found, then select it, right-click to bring up the menu, and open the file location. You'll see the settings file there as well.