Have you tried clicking the Game Localizator Assistant and/or the Add Game Instance? Also the latest Steam update to ED removed Legacy; are you sure Legacy ED is still installed? Those are the real simple options, so sorry if you've already tried them. Maybe try uninstalling EDHM_UI and reinstalling? Hopefully someone more knowledgeable will have better answers, but you should try in the EDHM_UI thread as well if you've not already.